EVENTS

**World War I** or the **First World War**, often abbreviated as **WWI** or **WW1**, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Contemporaneously known as the **Great War** or "the war to end all wars", it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history. It also was one of the deadliest conflicts in history, with an estimated 8.5 million combatant deaths and 13 million civilian deaths as a direct result of the war, while resulting genocides and the related 1918 Spanish flu pandemic caused another 17–100 million deaths worldwide, including an estimated 2.64 million Spanish flu deaths in Europe and as many as 675,000 Spanish flu deaths in the United States.

On 28 June 1914, Gavrilo Princip, a Bosnian Serb Yugoslav nationalist and member of the Serbian Black Hand military society, assassinated the Austro-Hungarian heir Archduke Franz Ferdinand in Sarajevo, leading to the July Crisis. In response, Austria-Hungary issued an ultimatum to Serbia on 23 July. Serbia's reply failed to satisfy the Austrians, and the two moved to a war footing. A network of interlocking alliances enlarged the crisis from a bilateral issue in the Balkans to one involving most of Europe. By July 1914, the great powers of Europe were divided into two coalitions: the Triple Entente, consisting of France, Russia, and Britain; and the Triple Alliance of Germany, Austria-Hungary, and Italy. The Triple Alliance was only defensive in nature, allowing Italy to stay out of the war until April 1915, when it joined the Allied Powers after its relations with Austria-Hungary deteriorated. Russia felt it necessary to back Serbia, and approved partial mobilisation after Austria-Hungary shelled the Serbian capital of Belgrade, which was a few kilometres from the border, on 28 July. Full Russian mobilisation was announced on the evening of 30 July; the following day, Austria-Hungary and Germany did the same, while Germany demanded Russia demobilise within twelve hours. When Russia failed to comply, Germany declared war on Russia on 1 August in support of Austria-Hungary, the latter following suit on 6 August; France ordered full mobilisation in support of Russia on 2 August. In the end, World War I would see the continent of Europe split into two major opposing alliances; the Allied Powers, primarily composed of the United Kingdom of Great Britain & Ireland, the United States, France, the Russian Empire, Italy, Japan, Portugal, and the many aforementioned Balkan States such as Serbia and Montenegro; and the Central Powers, primarily composed of the German Empire, the Austro-Hungarian Empire, the Ottoman Empire and Bulgaria.

Germany's strategy for a war on two fronts against France and Russia was to rapidly concentrate the bulk of its army in the West to defeat France within 6 weeks, then shift forces to the East before Russia could fully mobilise; this was later known as the Schlieffen Plan. On 2 August, Germany demanded free passage through Belgium, an essential element in achieving a quick victory over France. When this was refused, German forces invaded Belgium on 3 August and declared war on France the same day; the Belgian government invoked the 1839 Treaty of London and, in compliance with its obligations under this treaty, Britain declared war on Germany on 4 August. On 12 August, Britain and France also declared war on Austria-Hungary; on 23 August, Japan sided with Britain, seizing German possessions in China and the Pacific. In November 1914, the Ottoman Empire entered the war on the side of Austria-Hungary and Germany, opening fronts in the Caucasus, Mesopotamia, and the Sinai Peninsula. The war was fought in (and drew upon) each power's colonial empire also, spreading the conflict to Africa and across the globe.

The German advance into France was halted at the Battle of the Marne and by the end of 1914, the Western Front settled into a war of attrition, marked by a long series of trench lines that changed little until 1917 (the Eastern Front, by contrast, was marked by much greater exchanges of territory). In 1915, Italy joined the Allied Powers and opened a front in the Alps. Bulgaria joined the Central Powers in 1915 and Greece joined the Allies in 1917, expanding the war in the Balkans. The United States initially remained neutral, though even while neutral it became an important supplier of war materiel to the Allies. Eventually, after the sinking of American merchant ships by German submarines, the declaration by Germany that its navy would resume unrestricted attacks on neutral shipping, and the revelation that Germany was trying to incite Mexico to initiate war against the United States, the U.S. declared war on Germany on 6 April 1917. Trained American forces did not begin arriving at the front in large numbers until mid-1918, but the American Expeditionary Force ultimately reached some two million troops.

Though Serbia was defeated in 1915, and Romania joined the Allied Powers in 1916, only to be defeated in 1917, none of the great powers were knocked out of the war until 1918. The 1917 February Revolution in Russia replaced the Monarchy with the Provisional Government, but continuing discontent with the cost of the war led to the October Revolution, the creation of the Soviet Socialist Republic, and the signing of the Treaty of Brest-Litovsk by the new government in March 1918, ending Russia's involvement in the war. Germany now controlled much of eastern Europe and transferred large numbers of combat troops to the Western Front. Using new tactics, the German March 1918 Offensive was initially successful. The Allies fell back and held. The last of the German reserves were exhausted as 10,000 fresh American troops arrived every day. The Allies drove the Germans back in their Hundred Days Offensive, a continual series of attacks to which the Germans had no countermove. One by one, the Central Powers quit: first Bulgaria (September 29), then the Ottoman Empire (October 31) and the Austro-Hungarian Empire (November 3). With its allies defeated, revolution at home, and the military no longer willing to fight, Kaiser Wilhelm abdicated on 9 November and Germany signed an armistice on 11 November 1918, ending the war.

World War I was a significant turning point in the political, cultural, economic, and social climate of the world. The war and its immediate aftermath sparked numerous revolutions and uprisings. The Big Four (Britain, France, the United States, and Italy) imposed their terms on the defeated powers in a series of treaties agreed at the 1919 Paris Peace Conference, the most well known being the Treaty of Versailles with Germany. Ultimately, as a result of the war, the Austro-Hungarian, German, Ottoman, and Russian Empires ceased to exist, and numerous new states were created from their remains. However, despite the conclusive Allied victory (and the creation of the League of Nations during the peace conference, intended to prevent future wars), a second world war followed just over twenty years later.

**World War II** or the **Second World War**, often abbreviated as **WWII** or **WW2**, was a global war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. In a total war directly involving more than 100 million personnel from more than 30 countries, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and the only two uses of nuclear weapons in war. World War II was by far the deadliest conflict in human history, and resulted in 70 to 85 million fatalities, a majority being civilians. Tens of millions of people died due to genocides (including the Holocaust), starvation, massacres, and disease. In the wake of the Axis defeat, Germany and Japan were occupied, and war crimes tribunals were conducted against German and Japanese leaders.

World War II is generally considered to have begun on 1 September 1939, when Nazi Germany, under Adolf Hitler, invaded Poland. The United Kingdom and France subsequently declared war on the 3rd. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union had partitioned Poland and marked out their "spheres of influence" across Finland, Romania and the Baltic states. From late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan (along with other countries later on). Following the onset of campaigns in North Africa and East Africa, and the fall of France in mid-1940, the war continued primarily between the European Axis powers and the British Empire, with war in the Balkans, the aerial Battle of Britain, the Blitz of the UK, and the Battle of the Atlantic. On 22 June 1941, Germany led the European Axis powers in an invasion of the Soviet Union, opening the Eastern Front, the largest land theatre of war in history and trapping the Axis powers, crucially the German *Wehrmacht*, in a war of attrition.

Japan, which aimed to dominate Asia and the Pacific, was at war with the Republic of China by 1937. In December 1941, Japan attacked American and British territories with near-simultaneous offensives against Southeast Asia and the Central Pacific, including an attack on the US fleet at Pearl Harbor which forced the US to declare war against Japan; the European Axis powers declared war on the US in solidarity. Japan soon captured much of the western Pacific, but its advances were halted in 1942 after losing the critical Battle of Midway; later, Germany and Italy were defeated in North Africa and at Stalingrad in the Soviet Union. Key setbacks in 1943—including a series of German defeats on the Eastern Front, the Allied invasions of Sicily and the Italian mainland, and Allied offensives in the Pacific—cost the Axis powers their initiative and forced it into strategic retreat on all fronts. In 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained its territorial losses and turned towards Germany and its allies. During 1944 and 1945, Japan suffered reversals in mainland Asia, while the Allies crippled the Japanese Navy and captured key western Pacific islands.

The war in Europe concluded with the liberation of German-occupied territories, and the invasion of Germany by the Western Allies and the Soviet Union, culminating in the fall of Berlin to Soviet troops, Hitler's suicide and the German unconditional surrender on 8 May 1945. Following the Potsdam Declaration by the Allies on 26 July 1945 and the refusal of Japan to surrender on its terms, the United States dropped the first atomic bombs on the Japanese cities of Hiroshima, on 6 August, and Nagasaki, on 9 August. Faced with an imminent invasion of the Japanese archipelago, the possibility of additional atomic bombings, and the Soviet entry into the war against Japan and its invasion of Manchuria, Japan announced its intention to surrender on 15 August, then signed the surrender document on 2 September 1945, cementing total victory in Asia for the Allies.

World War II changed the political alignment and social structure of the globe. The United Nations (UN) was established to foster international co-operation and prevent future conflicts, and the victorious great powers—China, France, the Soviet Union, the United Kingdom, and the United States—became the permanent members of its Security Council. The Soviet Union and the United States emerged as rival superpowers, setting the stage for the nearly half-century-long Cold War. In the wake of European devastation, the influence of its great powers waned, triggering the decolonisation of Africa and Asia. Most countries whose industries had been damaged moved towards economic recovery and expansion. Political integration, especially in Europe, began as an effort to forestall future

## 1980 - 1999

hostilities, end pre-war enmities and forge a sense of common identity. The **1980s** (pronounced "nineteen-eighties", shortened to "the **'80s**") was a decade of the Gregorian calendar that began on January 1, 1980, and ended on December 31, 1989.

The decade saw major socioeconomic change due to advances in technology and a worldwide move away from planned economies and towards laissez-faire capitalism.

As economic deconstruction increased in the developed world, multiple multinational corporations associated with the manufacturing industry relocated into Thailand, Mexico, South Korea, Taiwan, and China. Japan and West Germany saw large economic growth during this decade. The AIDS epidemic became recognized in the 1980s and Global warming became well known to the scientific and political community in the 1980s.

The United Kingdom and the United States moved closer to supply-side economic policies beginning a trend towards global instability of international trade that would pick up more steam in the following decade as the fall of the USSR made right wing economic policy more powerful.

The final decade of the Cold War opened with the US-Soviet confrontation continuing largely without any interruption. Superpower tensions escalated rapidly as President Reagan scrapped the policy of détente and adopted a new, much more aggressive stance on the Soviet Union. The world came perilously close to nuclear war for the first time since the Cuban Missile Crisis in 1962, but the second half of the decade saw a dramatic easing of superpower tensions and ultimately the total collapse of Soviet communism.

Developing countries across the world faced economic and social difficulties as they suffered from multiple debt crises in the 1980s, requiring many of these countries to apply for financial assistance from the International Monetary Fund (IMF) and the World Bank. Ethiopia witnessed widespread famine in the mid-1980s during the corrupt rule of Mengistu Haile Mariam, resulting in the country having to depend on foreign aid to provide food to its population and worldwide efforts to address and raise money to help Ethiopians, such as the Live Aid concert in 1985.

Major civil discontent and violence occurred in the Middle East, including the Iran–Iraq War, the Soviet–Afghan War, the 1982 Lebanon War, the First Nagorno-Karabakh War, the Bombing of Libya in 1986, and the First Intifada in the Gaza Strip and the West Bank. Islamism became a powerful political force in the 1980s and many terrorist organizations, including Al Qaeda, started.

By 1986, nationalism was making a comeback in the Eastern Bloc and desire for democracy in communist-led socialist states combined with economic recession resulted in Mikhail Gorbachev's glasnost and perestroika, which reduced Communist Party power, legalized dissent and sanctioned limited forms of capitalism such as joint ventures with Western firms. After newly heated tension for most of the decade, by 1988 relations between the West and East had improved significantly and the Soviet Union was increasingly unwilling to defend its governments in satellite states.

1989 brought the overthrow and attempted overthrow of a number of governments led by communist parties, such as in Hungary, the Tiananmen Square protests of 1989 in China, the Czechoslovak "Velvet Revolution", Erich Honecker's East German regime, Poland's Soviet-backed government, and the violent overthrow of the Nicolae Ceauşescu regime in Romania. Destruction of the 155-km Berlin Wall, at the end of the decade, signalled a seismic geopolitical shift. The Cold War ended in the early 1990s with the successful Reunification of Germany and the USSR's demise after the August Coup of 1991.

The 1980s saw great advances in genetic and digital technology. After years of animal experimentation since 1985 the first genetic modification of 10 adult human beings took place in May 1989, a gene tagging experiment which led to the first true gene therapy implementation in September 1990. The first "designer babies", a pair of female twins were created in a laboratory in late 1989 and born in July 1990 after being sex-selected via the controversial assisted reproductive technology procedure preimplantation genetic diagnosis. Gestational surrogacy was first performed in 1985 with the first birth in 1986, making it possible for a woman to become a biological mother without experiencing pregnancy for the first time in history.

The 1980s was also an era of tremendous population growth around the world, surpassing even the 1970s and 1990s, thus arguably being the largest in human history. Population growth was particularly rapid in a number of African, Middle Eastern, and South Asian countries during this decade, with rates of natural increase close to or exceeding 4% annually.

The 1980s saw the advent of the ongoing practice of sex-selective abortion in China and India as ultrasound technology permitted parents to selectively abort baby girls.

The global Internet took shape in academia by the second half of the 1980s as well as many other computer networks of both academic and commercial use such as USENET, Fidonet and the Bulletin Board System. By 1989 the Internet and the networks linked to it were a global system with extensive transoceanic satellite links and nodes in most rich countries.

Video game consoles released in this decade included the continuing popularity of Atari 2600, Intellivision, Vectrex, Colecovision, SG-1000, NES/Famicom, Sega Master System, PC Engine/TurboGrafx-16, Mega Drive/Genesis and Game Boy. *Super Mario Bros.* and *Tetris* were the decade's two best selling and most popular video games. 1980's Atari VCS port of *Space Invaders* was the first killer app. *Pac-Man* was the decade's highest grossing arcade game. Home computers in that decade include the Commodore 64, VIC-20, the Apple II series, the Atari 8-bit family, Atari ST, Amiga, ZX Spectrum and MSX. Apple Macintosh,

## 1990's

The **1990s** (pronounced "the nineteen-nineties"; shortened to "the **'90s**") was a decade of the Gregorian calendar that began on January 1, 1990, and ended on December 31, 1999.

The 1990s saw a rise in the awareness of multiculturalism since the 1980s, as well as the advance of alternative media. Movements such as grunge, the rave scene and hip hop spread around the world to young people during that decade, aided by then-new technology such as cable television and the World Wide Web.

A combination of factors, including the continued mass mobilization of capital markets through neo-liberalism, the thawing and end of the decades-long Cold War, the beginning of the widespread proliferation of new media such as the Internet from the middle of the decade onwards, increasing skepticism towards government, and the dissolution of the Soviet Union led to a realignment and reconsolidation of economic and political power across the world and within countries. The dot-com bubble of 1997–2000 brought wealth to some entrepreneurs before its crash between 2000 and 2001.

The 1990s saw extreme advances in technology, with the World Wide Web, the first gene therapy trial, and the first designer babies all emerging in 1990 and being improved and built upon throughout the decade.

## 2000's

The **2000s** (pronounced "two-thousands"; shortened to the **'00s** and known as the aughts or noughties) was a decade of the Gregorian calendar that began on January 1, 2000, and ended on December 31, 2009.

The early part of the decade saw the long-time predicted breakthrough of economic giant China, which had double-digit growth during nearly the whole decade. To a lesser extent, India also benefited from an economic boom, which saw the two most populous countries becoming an increasingly dominant economic force. The rapid catching-up of emerging economies with developed countries sparked some protectionist tensions during the period and was partly responsible for an increase in energy and food prices at the end of the decade. The economic developments in the latter third of the decade were dominated by a worldwide economic downturn, which started with the crisis in housing and credit in the United States in late 2007 and led to the bankruptcy of major banks and other financial institutions. The outbreak of this global financial crisis sparked a global recession, beginning in the United States and affecting most of the industrialized world.

The growth of the Internet contributed to globalization during the decade, which allowed faster communication among people around the world; social networking sites arose as a new way for people to stay in touch no matter where they were, as long as they had an internet connection. The first social networking sites were Friendster, Myspace, Facebook, and Twitter, established in 2002, 2003, 2004, and 2006, respectively. Myspace was the most popular social networking website until June 2009, when Facebook overtook it in number of American users. E-mail continued to be popular throughout the decade and began to replace "snail mail" as the primary way of sending letters and other messages to people in distant locations, though it had existed since 1971.

The final decade of the Cold War opened with the US-Soviet confrontation continuing largely without any interruption. Superpower tensions escalated rapidly as President Reagan scrapped the policy of détente and adopted a new, much more aggressive stance on the Soviet Union. The world came perilously close to nuclear war for the first time since the Cuban Missile Crisis in 1962, but the second half of the decade saw a dramatic easing of superpower tensions and ultimately the total collapse of Soviet communism.

Climate change and global warming became common concerns in the 2000s. Prediction tools made significant progress during the decade, UN-sponsored organizations such as the IPCC gained influence, and studies such as the Stern report influenced public support for paying the political and economic costs of countering climate change. The global temperature kept climbing during the decade. In December 2009, the World Meteorological Organization (WMO) announced that the 2000s may have been the warmest decade since records began in 1850, with four of the five warmest years since 1850 having occurred in this decade. The WMO's findings were later echoed by the NASA and the NOA

New ethnic conflicts emerged in Africa, the Balkans, and the Caucasus, the former two which led to the Rwandan and Bosnian genocides, respectively. Signs of any resolution of tensions between Israel and the Arab world remained elusive despite the progress of the Oslo Accords, though The Troubles in Northern Ireland came to a standstill in 1998 with the Good Friday Agreement after 30 years of violence.

Microsoft Windows and IBM PC compatible were also introduced in that decade and helped popularize personal computers.