Question: How big was the UK during the Classical period?

History of the British Isles












Part of a series on theHistory of the BritishIsles
Overview
United Kingdom
England
Isle of Wight
Isles of Scilly
Scotland
Shetland
Orkney
Inner Hebrides
Outer Hebrides
Wales
Anglesey
Northern Ireland
Ireland
Isle of Man (Mann)
Channel Islands
Jersey
Guernsey

Prehistoric period
Prehistoric Britain
Prehistoric England
Prehistoric Scotland
Prehistoric Shetland
Prehistoric Orkney
Prehistoric Wales
Prehistoric Ireland
Prehistoric Mann

Classical period
Roman Britain
Roman Scotland
Roman Wales
Protohistoric Ireland, Roman Ireland
End of Roman rule
Sub-Roman Britain

Medieval period
Medieval England
Early medieval England
High medieval England
Late medieval England
Medieval Scotland
Early medieval Scotland
High medieval Scotland
Late medieval Scotland
Medieval Wales
Early medieval Wales
High medieval Wales
Late medieval Wales
Medieval Ireland
Early medieval Ireland
High medieval Ireland
Late medieval Ireland
Medieval Mann

Early modern period
Early modern Britain
Early modern England
Early modern Scotland
Early modern Wales
Early modern Ireland
Early modern Mann

Late modern period
United Kingdom (since 1707)
Victorian period
Edwardian period
First World War
Interwar period
Second World War
Post-war period (political history)
Post-war period (social history)
Late modern Ireland
Late modern Mann
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The British Isles have witnessed intermittent periods of competition and cooperation between the people that occupy the various parts of Great Britain, the Isle of Man, Ireland, the Bailiwick of Guernsey, the Bailiwick of Jersey and the smaller adjacent islands.
Today, the British Isles contain two sovereign states: the Republic of Ireland and the United Kingdom.  There are also three Crown dependencies: Guernsey, Jersey and the Isle of Man.  The United Kingdom comprises England, Northern Ireland, Scotland, and Wales, each country having its own history, with all but Northern Ireland having been independent states at one point. The history of the formation of the United Kingdom is very complex.
The British monarch was head of state of all of the countries of the British Isles from the Union of the Crowns in 1603 until the enactment of the Republic of Ireland Act in 1949, although the term "British Isles" was not used in 1603.  Additionally, since the independence of most of Ireland, historians of the region often avoid the term British Isles due to the complexity of relations between the peoples of the archipelago (see: Terminology of the British Isles).
Prehistoric

Palaeolithic and Mesolithic periods
The Palaeolithic and Mesolithic, also known as the Old and Middle Stone Ages, were characterised by a hunter-gatherer economy and a reliance on stone tool technologies.
Palaeolithic
The Lower Palaeolithic period in the British Isles saw the region's first known habitation by early hominids, specifically the extinct Homo heidelbergensis.
One of the most prominent archaeological sites dating to this period is that of Boxgrove Quarry in West Sussex, southern England.
Mesolithic (10,000 to 4,500 BC)
By the Mesolithic, Homo sapiens, or modern humans, were the only hominid species to still survive in the British Isles.
British Isles were linked to continental Europe by a territory named Doggerland.
Neolithic and Bronze Ages (4500 to 600BC)

In the British Isles, the Neolithic and Bronze Ages saw the transformation of British and Irish society and landscape. It saw the adoption of agriculture, as communities gave up their hunter-gatherer modes of existence to begin farming.
Iron Age (1200BC to 600AD)

As its name suggests, the British Iron Age is also characterised by the adoption of iron, a metal which was used to produce a variety of different tools, ornaments and weapons.
In the course of the first millennium BC, and possibly earlier, some combination of trans-cultural diffusion and immigration from continental Europe resulted in the establishment of Celtic languages in the islands, eventually giving rise to the Insular Celtic group. What languages were spoken in the islands before is unknown, though they are assumed to have been Pre-Indo-European.
Classical period

In 55 and 54 BC, Roman general and future dictator Gaius Julius Caesar launched two separate invasions of the British Isles, though neither resulted in a full Roman occupation of the island.
From AD 40 to about AD 410, southern Britain was a part of the Roman Empire, with archaeologists referring to this area as "Roman Britain", and this time span the "Romano-British period" or the "Roman Iron Age".
In and around the same time period, Ireland was being invaded and settled by Gaels.
Medieval period

Early medieval

The Early medieval period saw a series of invasions of Britain by the Germanic-speaking Saxons, beginning in the 5th century. Anglo-Saxon kingdoms were formed and, through wars with British states, gradually came to cover the territory of present-day England. Around 600, seven principal kingdoms had emerged, beginning the so-called period of the Heptarchy. During that period, the Anglo-Saxon states were Christianised (the conversion of the British ones had begun much earlier). In the 9th century, Vikings from Denmark and Norway conquered most of England. Only the Kingdom of Wessex under Alfred the Great survived and even managed to re-conquer and unify England for much of the 10th century, before a new series of Danish raids in the late 10th century and early 11th century culminated in the wholesale subjugation of England to Denmark under Canute the Great. Danish rule was overthrown and the local House of Wessex was restored to power under Edward the Confessor for about two decades until his death in 1066.
Late Medieval

In 1066, William, Duke of Normandy said he was the rightful heir to the English throne, invaded England, and defeated King Harold II at the Battle of Hastings. Proclaiming himself to be King William I, he strengthened his regime by appointing loyal members of the Norman elite to many positions of authority, building a system of castles across the country and ordering a census of his new kingdom, the Domesday Book. The Late Medieval period was characterised by many battles between England and France, coming to a head in the Hundred Years' War from which France emerged victorious. The monarchs throughout the Late Medieval period belonged to the houses of Plantaganet, Lancaster and York.
Early modern period

Major historical events in the early modern period include the English Renaissance, the English Reformation and Scottish Reformation, the English Civil War, the Restoration of Charles II, the Glorious Revolution, the Treaty of Union, the Scottish Enlightenment and the formation of the First British Empire.
19th century

1801 to 1837

Union of Great Britain and Ireland
The Kingdom of Ireland was a settler state; the monarch was the incumbent monarch of England and later of Great Britain. The Lord Lieutenant of Ireland headed the government on behalf of the monarch. He was assisted by the Chief Secretary of Ireland. Both were responsible to the government in London rather than to the Parliament of Ireland. Before the Constitution of 1782, the Irish parliament was also severely fettered, and decisions in Irish courts could be overturned on appeal to the British House of Lords in London.
Ireland gained a degree of independence in the 1780s thanks to Henry Grattan. During this time the effects of the penal laws on the primarily Roman Catholic population were reduced, and some property-owning Catholics were granted the franchise in 1794; however, they were still excluded from becoming members of the Irish House of Commons. This brief period of limited independence came to an end following the Irish Rebellion of 1798, which occurred during the British war with revolutionary France. The British government's fear of an independent Ireland siding against them with the French resulted in the decision to unite the two countries. This was brought about by legislation in the parliaments of both kingdoms and came into effect on 1 January 1801. The Irish had been led to believe by the British that their loss of legislative independence would be compensated for with Catholic Emancipation, i.e. by the removal of civil disabilities placed upon Roman Catholics in both Great Britain and Ireland. However, King George III was bitterly opposed to any such Emancipation and succeeded in defeating his government's attempts to introduce it. 
Napoleonic Wars

During the War of the Second Coalition (1799–1801), Britain occupied most of the French and Dutch overseas possessions, the Netherlands having become a satellite state of France in 1796, but tropical diseases claimed the lives of over 40,000 troops. When the Treaty of Amiens ended the war, Britain agreed to return most of the territories it had seized. The peace settlement was in effect only a ceasefire, and Napoleon continued to provoke the British by attempting a trade embargo on the country and by occupying the city of Hanover, capital of the Electorate, a German-speaking duchy which was in a personal union with the United Kingdom. In May 1803, war was declared again. Napoleon's plans to invade Britain failed, chiefly due to the inferiority of his navy, and in 1805 Lord Nelson's Royal Navy fleet decisively defeated the French and Spanish at Trafalgar, ending any hopes Napoleon had to wrest control of the oceans away from the British.[1]

In 1806, Napoleon issued the series of Berlin Decrees, which brought into effect the Continental System. This policy aimed to eliminate the threat from the British by closing French-controlled territory to foreign trade. The British Army remained a minimal threat to France; it maintained a standing strength of just 220,000 men at the height of the Napoleonic Wars, whereas France's armies exceeded a million men—in addition to the armies of numerous allies and several hundred thousand national guardsmen that Napoleon could draft into the French armies when they were needed. Although the Royal Navy effectively disrupted France's extra-continental trade—both by seizing and threatening French shipping and by seizing French colonial possessions—it could do nothing about France's trade with  the major continental economies and posed little threat to French territory in Europe. France's population and agricultural capacity far outstripped that of Britain.[3]
Top French  leaders argued that cutting the British off from the European mainland would end their economic hegemony, but the United Kingdom possessed the greatest industrial capacity in the world, and its mastery of the seas allowed it to build up considerable economic strength through trade to its possessions from its rapidly expanding new Empire. In terms of economic damage to Britain, the blockade was largely ineffective. As Napoleon realized that extensive trade was going through Spain and Russia, he invaded those two countries. He tied down his forces in Spain, and lost very badly in Russia in 1812.[4] The Spanish uprising in 1808 at last permitted Britain to gain a foothold on the Continent. The Duke of Wellington and his army of British and Portuguese gradually pushed the French out of Spain, and in early 1814, as Napoleon was being driven back in the east by the Prussians, Austrians, and Russians, Wellington invaded southern France. After Napoleon's surrender and exile to the island of Elba, peace appeared to have returned, but when he escaped back into France in 1815, the British and their allies had to fight him again. The armies of Wellington and Blucher defeated Napoleon once and for all at Waterloo.[5]

Simultaneous with the Napoleonic Wars, trade disputes and British impressment of American sailors led to the War of 1812 with the United States. A central event in American history, it was little noticed in Britain, where all attention was focused on the struggle with France. The British could devote few resources to the conflict until the fall of Napoleon in 1814. American frigates also inflicted a series of embarrassing defeats on the British navy, which was short on manpower due to the conflict in Europe.
A stepped-up war effort that year brought about some successes such as the burning of Washington, D.C., but the Duke of Wellington argued that an outright victory over the U.S. was impossible because the Americans controlled the western Great Lakes and had destroyed the power of Britain's Indian allies. A full-scale British invasion was defeated in upstate New York. Peace was agreed to at the end of 1814, but unaware of this, Andrew Jackson won a great victory over the British at the Battle of New Orleans in January 1815 (news took several weeks to cross the Atlantic before the advent of steam ships). The Treaty of Ghent subsequently ended the war with no territorial changes.  It was the last war between Britain and the United States.[6]
George IV and William IV
Britain emerged from the Napoleonic Wars a very different country than it had been in 1793. As industrialisation progressed, society changed, becoming more urban and less rural. The postwar period saw an economic slump, and poor harvests and inflation caused widespread social unrest. Europe after 1815 was on guard against a return of Jacobinism, and even liberal Britain saw the passage of the Six Acts in 1819, which proscribed radical activities. By the end of the 1820s, along with a general economic recovery, many of these repressive laws were repealed  and in 1828 new legislation guaranteed the civil rights of religious dissenters.
A weak ruler as regent (1811–20) and king (1820–30), George IV let his ministers take full charge of government affairs, playing a far lesser role than his father, George III. His governments, with little help from the king, presided over victory in the Napoleonic Wars, negotiated the peace settlement, and attempted to deal with the social and economic malaise that followed.[7] His brother William IV ruled (1830–37), but was little involved in politics. His reign saw several reforms: the poor law was updated, child labour restricted, slavery abolished in nearly all the British Empire, and, most important, the Reform Act 1832 refashioned the British electoral system.[8]
There were no major wars until the Crimean War (1853–56).[9] While Prussia, Austria, and Russia, as absolute monarchies, tried to suppress liberalism wherever it might occur, the British came to terms with new ideas. Britain intervened in Portugal in 1826 to defend a constitutional government there and recognising the independence of Spain's American colonies in 1824.[10] British merchants and financiers, and later railway builders, played major roles in the economies of most Latin American nations.[11]
Whig reforms of the 1830s
The Whig Party recovered its strength and unity by supporting moral reforms, especially the reform of the electoral system, the abolition of slavery and emancipation of the Catholics. Catholic emancipation was secured in the Catholic Relief Act of 1829, which removed the most substantial restrictions on Roman Catholics in Great Britain and Ireland.[12]
The Whigs became champions of Parliamentary reform. They made Lord Grey prime minister 1830–1834, and the Reform Act of 1832 became their signature measure. It broadened the franchise and ended the system of "rotten borough" and "pocket boroughs" (where elections were controlled by powerful families), and instead redistributed power on the basis of population. It added 217,000 voters to an electorate of 435,000 in England and Wales. The main effect of the act was to weaken the power of the landed gentry, and enlarge the power of the professional and business middle-class, which now for the first time had a significant voice in Parliament. However, the great majority of manual workers, clerks, and farmers did not have enough property to qualify to vote. The aristocracy continued to dominate the government, the Army and Royal Navy, and high society.[12] After parliamentary investigations demonstrated the horrors of child labour, limited reforms were passed in 1833.
Chartism emerged after the 1832 Reform Bill failed to give the vote  to the working class. Activists denounced the "betrayal" of the working classes and the "sacrificing" of their "interests" by the "misconduct" of the government. In 1838, Chartists issued the People's Charter demanding manhood suffrage, equal sized election districts, voting by ballots, payment of Members of Parliament (so that poor men could serve), annual Parliaments, and abolition of property requirements. The ruling class saw the movement as pathological,  so the Chartists were unable to force serious constitutional debate. Historians see Chartism as both a continuation of the 18th century fight against corruption and as a new stage in demands for democracy in an industrial society.[13] In 1832 Parliament abolished slavery in the Empire with the Slavery Abolition Act 1833. The government purchased the slaves for £20,000,000 (the money went to rich plantation owners who mostly lived in England), and freed the slaves, especially those in the Caribbean sugar islands.[14]
Leadership
Prime Ministers of the period included: William Pitt the Younger, Lord Grenville, Duke of Portland, Spencer Perceval, Lord Liverpool, George Canning, Lord Goderich, Duke of Wellington, Lord Grey, Lord Melbourne, and Sir Robert Peel.
Victorian era


The Victorian era was the  period of Queen Victoria's rule between 1837 and 1901 which signified the height of the British Industrial Revolution and the apex of the British Empire. Scholars debate whether the Victorian period—as defined by a variety of sensibilities and political concerns that have come to be associated with the Victorians—actually begins with the passage of the Reform Act 1832. The era was preceded by the Regency era and succeeded by the Edwardian period. Victoria became queen in 1837 at age 18. Her long reign saw Britain reach the zenith of its economic and political power, with the introduction of steam ships, railroads, photography, and the telegraph. Britain again remained mostly inactive in Continental politics. 
Foreign policy
Free trade imperialism
The Great London Exhibition of 1851 clearly demonstrated Britain's dominance in engineering and industry; that lasted until the rise of the United States and Germany in the 1890s. Using the imperial tools of free trade and financial investment,[15] it exerted major influence on many countries outside Europe, especially in Latin America and Asia. Thus Britain had both a formal Empire based on British rule as well as an informal one based on the British pound.[16]
Russia, France and the Ottoman Empire
One nagging fear was the possible collapse of the Ottoman Empire. It was well understood that a collapse of that country would set off a scramble for its territory and possibly plunge Britain into war. To head that off Britain sought to keep the Russians from occupying Constantinople and taking over the Bosporous Straits, as well as from threatening India via Afghanistan.[17] In 1853, Britain and France intervened in the Crimean War against Russia. Despite mediocre generalship, they managed to capture the Russian port of Sevastopol, compelling Tsar Nicholas I to ask for peace.[18]
The next Russo-Ottoman war in 1877 led to another European intervention, although this time at the negotiating table. The Congress of Berlin blocked Russia from imposing the harsh Treaty of San Stefano on the Ottoman Empire.[19] Despite its alliance with the French in the Crimean War, Britain viewed the Second Empire of Napoleon III with some distrust, especially as the emperor constructed ironclad warships and began returning France to a more active foreign policy. 
American Civil War
During the American Civil War (1861–1865), British leaders favoured the Confederacy, a major source of cotton for textile mills. Prince Albert was effective in defusing a war scare in late 1861. The British people, however, who depended heavily on American food imports, generally favoured the Union. What little cotton was available came from New York, as the blockade by the US Navy shut down 95% of Southern exports to Britain. In September 1862, Abraham Lincoln announced the Emancipation Proclamation. Since support of the Confederacy now meant supporting the institution of slavery, there was no possibility of European intervention.[20] The British sold arms to both sides, built blockade runners for a lucrative trade with the Confederacy, and surreptitiously allowed warships to be built for the Confederacy. The warships caused a major diplomatic row that was resolved in the Alabama Claims in 1872, in the Americans' favour.[21]
Empire expands
In 1867, Britain united most of its North American colonies as the Dominion of Canada, giving it self-government and responsibility for its own defence, but Canada did not have an independent foreign policy until 1931. Several of the colonies temporarily refused to join the Dominion despite pressure from both Canada and Britain; the last one, Newfoundland, held out until 1949. The second half of the 19th century saw a huge expansion of Britain's colonial empire, mostly in Africa. A talk of the Union Jack flying "from Cairo to Cape Town" only became a reality at the end of the Great War. Having possessions on six continents, Britain had to defend all of its empire and did so with a volunteer army, the only great power in Europe to have no conscription. Some questioned whether the country was overstretched.
The rise of the German Empire since its creation in 1871 posed a new challenge, for it (along with the United States), threatened to usurp Britain's place as the world's foremost industrial power. Germany acquired a number of colonies in Africa and the Pacific, but Chancellor Otto von Bismarck succeeded in achieving general peace through his balance of power strategy. When William II became emperor in 1888, he discarded Bismarck, began using bellicose language, and planned to build a navy to rival Britain's.[22]
Ever since Britain had wrested control of the Cape Colony from the Netherlands during the Napoleonic Wars, it had co-existed with Dutch settlers who had migrated further away from the Cape and created two republics of their own. The British imperial vision called for control over these new countries, and the Dutch-speaking "Boers" (or "Afrikaners") fought back in the War in 1899–1902. Outgunned by a mighty empire, the Boers waged a guerrilla war (which certain other British territories would later employ to attain independence). This gave the British regulars a difficult fight, but their weight of numbers, superior equipment, and often brutal tactics, eventually brought about a British victory. The war had been costly in human rights and was widely criticised by Liberals in Britain and worldwide. However, the United States gave its support. The Boer republics were merged into the Union of South Africa in 1910; this had internal self-government, but its foreign policy was controlled by London and it was an integral part of the British Empire.[23]
Ireland and the move to Home Rule

Part of the agreement which led to the 1800 Act of Union stipulated that the Penal Laws in Ireland were to be repealed and Catholic emancipation granted. However King George III blocked emancipation, arguing that to grant it would break his coronation oath to defend the Anglican Church. A campaign by the lawyer Daniel O'Connell, and the death of George III, led to the concession of Catholic Emancipation in 1829, allowing Roman Catholics to sit in the Parliament of the United Kingdom. But Catholic Emancipation was not O'Connell's ultimate goal, which was Repeal of the Act of Union with Great Britain. On 1 January 1843 O'Connell confidently, but wrongly, declared that Repeal would be achieved that year. When potato blight hit the island in 1846, much of the rural population was left without food, because cash crops were being exported to pay rents.[24][25]
British politicians such as the Prime Minister Robert Peel were at this time wedded to the economic policy of laissez-faire,  which argued against state intervention. While funds were raised by private individuals and charities, lack of adequate action let the problem become a catastrophe. Cottiers (or farm labourers) were largely wiped out during what is known in Ireland as the "Great Hunger". A significant minority elected Unionists, who championed the Union. A Church of Ireland former Tory barrister turned nationalist campaigner, Isaac Butt, established a new moderate nationalist movement, the Home Rule League, in the 1870s. After Butt's death the Home Rule Movement, or the Irish Parliamentary Party as it had become known, was turned into a major political force under the guidance of William Shaw and a radical young Protestant landowner, Charles Stewart Parnell. 
Parnell's movement campaigned for "Home Rule", by which they meant that Ireland would govern itself as a region within the United Kingdom. Two Home Rule Bills (1886 and 1893) were introduced by Liberal Prime Minister William Ewart Gladstone, but neither became law, mainly due to opposition from the Conservative Party and the House of Lords. The issue was a source of contention throughout Ireland, as a significant majority of Unionists (largely but not exclusively based in Ulster), opposed Home Rule, fearing that a Catholic Nationalist ("Rome Rule") Parliament in Dublin would discriminate or retaliate against them, impose Roman Catholic doctrine, and impose tariffs on industry. While most of Ireland was primarily agricultural, six of the counties in Ulster were the location of heavy industry and would be affected by any tariff barriers imposed. 
20th century to present

1900–1945
At the turn of the century, Britain was involved in the Second Boer War in South Africa.
Queen Victoria, who had reigned since 1837, died in 1901 and was succeeded by her son, Edward VII, who, in turn, was succeeded by George V in 1910.
In 1914, Britain entered the First World War by declaring war on Germany. Nearly a million Britons were killed in the war, which lasted until Germany's surrender on 11 November 1918.
Home Rule in Ireland, which had been a major political issue since the late 19th century but put on hold by the war, was somewhat resolved after the Irish War of Independence brought the British Government to a stalemate in 1922. Negotiations led to the formation of the Irish Free State. However, in order to appease Unionists in the north, the north-eastern six counties remained as part of the U.K., with its own Parliament at Stormont in Belfast.
Having been in power for much of the early 20th century under Prime Ministers Campbell-Bannerman, Asquith and Lloyd George, the Liberal party suffered a sharp decline from 1922; the newly formed Labour party, whose leader Ramsay MacDonald led two minority governments, swiftly became the Conservatives' main opposition, and Britain's largest party of the left.
King Edward VIII succeeded his father George V in January 1936, but was quickly met with difficulties due to his love affair with Wallis Simpson, an American who had already been married twice. In December, he decided to abdicate in order to be able to marry Simpson, and his brother George VI was crowned king.
In order to avoid another European conflict, Prime Minister Neville Chamberlain attempted to appease German Chancellor Adolf Hitler, who was expanding his country's territory across Central Europe. Despite proclaiming that he has achieved "peace for our time", Britain declared war on Germany on 3 September 1939, following Hitler's invasion of Poland two days earlier. The U.K. thus joined the Allied forces in opposition to the Axis forces of Nazi Germany and Fascist Italy. For the first time, civilians were not exempt from the war, as London suffered nightly bombings during the Blitz. At the war's end in 1945, however, the U.K. emerged as one of the victorious nations.
1945–1997
Winston Churchill, who had been leader of the wartime coalition government, suffered a surprising landslide defeat to Clement Attlee's Labour party in 1945 elections. Attlee created a Welfare State in Britain, which most notably provided free healthcare under the National Health Service. By the late 1940s, the Cold War was underway, which would dominate British foreign policy for another 40 years.
In 1951, Churchill and the Tories returned to power; they would govern uninterrupted for the next 13 years. King George VI died in 1952, and was succeeded by his eldest daughter, Elizabeth II.
Churchill was succeeded in 1955 by Sir Anthony Eden, whose premiership was dominated by the Suez Crisis, in which Britain, France and Israel plotted to bomb Egypt after its President Nasser nationalised the Suez Canal. Eden's successor, Harold Macmillan, split the Conservatives when Britain applied to join the European Economic Community, but French President Charles de Gaulle vetoed the application.
Labour returned to power in 1964 under Harold Wilson, who brought in a number of social reforms, including the legalisation of abortion, the abolition of capital punishment and the decriminalisation of homosexuality. In 1973, Conservative Prime Minister Edward Heath succeeded in securing U.K. membership in the European Economic Community (EEC), what would later become known as the European Union. Wilson, having lost the 1970 election to Heath, returned to power in 1974; however, Labour's reputation was harmed by the winter of discontent of 1978-9 under Jim Callaghan, which enabled the Conservatives to re-take control of Parliament in 1979, under Margaret Thatcher, Britain's first female Prime Minister.
Although Thatcher's economic reforms made her initially unpopular, her decision in 1982 to retake the Falkland Islands from invading Argentine forces, in what would become known as the Falklands War, changed her fortunes and enabled a landslide victory in 1983. After winning an unprecedented third election in 1987, however, Thatcher's popularity began to fade and she was replaced by former chancellor John Major in 1990.
Tensions between Protestants and Catholics in Northern Ireland came to a head in the late 1960s, when nationalist participants in a civil rights march were shot by members of the B Specials, a reserve police force manned almost exclusively by unionists. From this point the Provisional Irish Republican Army, also known as the Provos or simply the IRA, began a bombing campaign throughout the U.K., beginning a period known as The Troubles, which lasted until the late 1990s.
Prince Charles, the Prince of Wales and Elizabeth's eldest son married Lady Diana Spencer in 1981; the couple had two children, William and Harry, but divorced in 1992, during which year Prince Andrew and Princess Anne also separated from their spouses, leading the Queen to call the year her 'annus horribilis'. In 1997, Diana was killed in a car crash in Paris, leading to a mass outpouring of grief across the United Kingdom, and indeed the world.
On the international stage, the second half of the 20th century was dominated by the Cold War between the Soviet Union and its socialist allies and the United States and its capitalist allies; the U.K. was a key supporter of the latter, joining the anti-Soviet military alliance NATO in 1949. During this period, the U.K. became involved in several Cold War conflicts, such as the Korean War (1950–1953). In contrast, the Republic of Ireland remained neutral and provided troops to U.N. peace-keeping missions.
1997–present
In 1997, Tony Blair was elected prime minister in a landslide victory for the so-called 'New Labour', economically following 'Third Way' programmes. Blair won re-election in 2001 and 2005, before handing over power to his chancellor Gordon Brown in 2007. After a decade of prosperity both the U.K. and the Irish Republic were affected by the global recession, which began in 2008. In 2010, the Conservative party formed a coalition government with the Liberal Democrats, with Tory leader David Cameron as Prime Minister. In 2015 polling suggested a hung parliament was the most likely outcome in the General Election; however the Conservatives secured a slim majority.
After the September 11 Attacks, the U.K. supported the U.S. in their "War on Terror", and joined them in the War in Afghanistan (2001–present) and the invasion of Iraq. London was attacked in July 2005. The U.K. also took a leading role in the 2011 military intervention in Libya. In a referendum in 2016, the U.K. voted to leave the European Union.
After becoming Prime Minister and leader of the Conservative Party shortly after David Cameron’s resignation following the Brexit result, an election, called by the incumbent Prime Minister Theresa May (the former Home Secretary) in 2017, breaking the Fixed Term Parliaments Act, in an attempt to gain a larger majority for Brexit negotiations and also as an advantage, as the Labour Party were doing badly in the polls, the Conservative Party lost their majority despite winning a record number of votes, and were restricted to forming a "supply and confidence" deal, yet not a formal coalition with the Northern Irish unionist party, the DUP in order to have a working majority in the House of Commons.
Periods

Prehistoric Britain (Prehistory–AD 43)
Prehistoric Scotland
Prehistoric Wales
Roman Britain (44–407)
Sub-Roman Britain (407–597)
Britain in the Middle Ages (597–1485)
Anglo-Saxon England (597–1066)
Scotland in the Early Middle Ages (400–900)
Scotland in the High Middle Ages (900–1286)
Norman Conquest of England (1066)
Scotland in the Late Middle Ages (1286–1513)
Wars of Scottish Independence (1296–1357)
Wales in the Middle Ages (411-1542)
Early modern Britain
Tudor period (1485–1603)
Tudor conquest of Ireland
English Renaissance
Elizabethan era (1558–1603)
First British Empire (1583–1783)
Jacobean era (1567–1625)
Union of the Crowns (1603)
Caroline era (1625–1642)
English Civil War (1642–1651)
English Interregnum (1651–1660)
Restoration (1660)
Glorious Revolution (1688)
Scottish Enlightenment
Kingdom of Great Britain (1707–1800)
Second British Empire (1783–1815)
Georgian era
History of the United Kingdom (1801–)
United Kingdom of Great Britain and Ireland (1801–1922)
Britain's Imperial Century (1815–1914)
Regency (1811–1820)
Victorian era (1837–1901)
Edwardian period (1901–1910)
Britain in World War I (1914–1918)
Coalition Government 1916–1922
United Kingdom of Great Britain and Northern Ireland (1922–)
Conservative Government 1922–1924
Conservative Government 1924–1929
Labour Government 1929–1931
National Government (1931–1940)
Britain in World War II (1939–1945)
History of the United Kingdom (1945–present)
Premiership of Margaret Thatcher (1979–1990)
Premiership of Tony Blair (1997–2007)
Premiership of Gordon Brown (2007–2010)
Premiership of David Cameron (2010–2016)
Premiership of Theresa May (2016–)
History of the Republic of Ireland (1922–)
Irish civil war
Timeline history of the British Isles





































































































































































DateStates/PeoplesEventspre-6th c. BC Prehistoric Britain, Prehistoric Ireland6th to 1st c. BCBritish Iron Age, Iron Age tribes in Britain, Insular CelticGaulsBrythonsPictsGaels51 BCGallia Lugdunensis (Roman province)43 ADBritannia (Roman province)Roman conquest of Britain410BrythonsAnglo-Saxon EnglandHen Ogledd638Kingdom of StrathclydeViking raids843845Kingdom of Brittany878Danelaw911Duchy of Normandy927Kingdom of England1054Kingdom of AlbaNorman conquest of England1079Kingdom of Mann and the Isles1098CymruKingdom of NorwayNorman invasion of Ireland1171Lordship of Ireland1204Magna Carta
Treaty of York12661282Wars of Scottish Independence1333Bailiwick of GuernseyBailiwick of JerseyIsle of Man1469Kingdom of ScotlandPoynings' Law1541Scottish Reformation
Tudor conquest of Ireland
Union of the Crowns1607Kingdom of IrelandFlight of the Earls
Plantation of Ulster
Wars of the Three Kingdoms1641Confederate Ireland1649Commonwealth of EnglandCromwellian conquest of Ireland1653Commonwealth of England, Scotland and Ireland1660Kingdom of EnglandKingdom of ScotlandKingdom of IrelandPenal Laws
Revolution of 1688
Battle of the Boyne1707Kingdom of Great BritainActs of Union 1707
Battle of Culloden
Irish Rebellion of 17981801United Kingdom of Great Britain and IrelandAct of Union 1800
Catholic Emancipation
Irish Potato Famine1919Irish RepublicIrish War of Independence
Partition of Ireland1921/2United Kingdom of Great Britain and Northern IrelandNorthern IrelandIrish Free State1937IrelandThe Emergency
Battle of Britain
The Troubles
Celtic Tiger1999WalesScotlandGood Friday Agreement
Geographic
History of England (Timeline)
History of Cornwall
History of London
History of Scotland
History of Wales
History of Ireland
History of Northern Ireland
History of the Republic of Ireland (Timeline)
History of the Isle of Man
History of Jersey
States
England in the Middle Ages
Kingdom of England (to 1707)
Kingdom of Scotland (to 1707)
Kingdom of Ireland (1541–1801)
Kingdom of Great Britain (1707–1801)
United Kingdom of Great Britain and Ireland (1801–1927)
United Kingdom of Great Britain and Northern Ireland (1927 – )
Isle of Man (unrecorded date to present)
Supranational
British Empire
Commonwealth of Nations
European Union
See also
Timeline of the British Army
Timeline of British diplomatic history
British military history
List of British monarchs
British monarchs' family tree
Economic history of the United Kingdom
History of British society


Further reading
A History of Britain: At the Edge of the World, 3500 BC - 1603 AD by Simon Schama, Hyperion Books, 2000 ISBN0-7868-6675-6
A History of Britain, Volume 2: The Wars of the British 1603-1776 by Simon Schama, Hyperion Books, 2001 ISBN0-7868-6675-6
A History of Britain III: The Fate of Empire 1776-2000 by Simon Schama
The British Isles: A History of Four Nations by Hugh Kearney, Cambridge University Press 2nd edition 2006, ISBN978-0-521-84600-4
A History of Britain - The Complete Collection on DVD by Simon Schama, BBC 2002
The Isles, A History by Norman Davies, Oxford University Press, 1999, ISBN0-19-513442-7
Shortened History of England by G. M. Trevelyan Penguin Books ISBN0-14-023323-7
This Sceptred Isle: 55BC-1901  by Christopher Lee Penguin Books ISBN0-14-026133-8 (originally a radio series )
The Reduced History of Britain - by Chas Newkey-Burden
The Great Heritage: a History of Britain for Canadians, by Richard S. Lambert, House of Grant, 1964 (and earlier editions and/or printings)












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The History Files