Question: What is the term given to the period of time in which militaristic European powers increased their control of Africa from 10 to 90%?

Context paragraphs:
Duke of the Franks: The title Duke [and Prince] of the Franks ("dux" ["et princeps"] "Francorum") has been used for three different offices, always with "duke" implying military command and "prince", on those occasions when it was used either with or in preference to "duke", implying something approaching sovereign or regalian rights.  The term "Franks" may refer to an ethnic group or the inhabitants of a territory called "Francia", named after the original Franks.  The first office was that of the mayors of the palace of the Merovingian kings of the Franks, whose powers increased as those of the kings declined.  The second was that of the second-in-command to the early kings of France, the last incumbent of which succeeded to the throne in 987.  This title was sometimes rendered Duke of France ("dux Franciae").  The third instance was that of the rulers of the Frankish-inhabited lands of Germany, the so-called "tribal" duchy of Franconia.

Expansionist nationalism: Expansionist nationalism is an aggressive and radical form of nationalism that incorporates autonomous, patriotic sentiments with a belief in expansionism.  The term was coined during the late nineteenth century as European powers indulged in the 'Scramble for Africa' in the name of national glory, but has been most associated with militarist governments during the 20th century including Fascist Italy, Nazi Germany, the Japanese empire, and the Balkans countries of Albania (Greater Albania), Croatia (Greater Croatia) and Serbia (Greater Serbia).

Berlin Conference: The Berlin Conference of 1884–85, also known as the Congo Conference (German: "Kongokonferenz" ) or West Africa Conference ("Westafrika-Konferenz"), regulated European colonization and trade in Africa during the New Imperialism period, and coincided with Germany's sudden emergence as an imperial power.  The conference was organized by Otto von Bismarck, first Chancellor of Germany, its outcome, the General Act of the Berlin Conference, can be seen as the formalization of the Scramble for Africa.  The conference ushered in a period of heightened colonial activity by European powers, which eliminated or overrode most existing forms of African autonomy and self-governance.

Ekman transport: Ekman transport, part of Ekman motion theory first investigated in 1902 by Vagn Walfrid Ekman, is the term given for the 90° net transport of the surface layer of a fluid (the layer affected by wind) by wind forcing.  This phenomenon was first noted by Fridtjof Nansen, who recorded that ice transport appeared to occur at an angle to the wind direction during his Arctic expedition during the 1890s.  The direction of transport is dependent on the hemisphere: in the northern hemisphere, transport occurs at 90° clockwise from wind direction, while in the southern hemisphere it occurs at a 90° counterclockwise.

European migrant crisis: The European migrant crisis, or the European refugee crisis, is a term given to a period beginning in 2015 when rising numbers of people arrived in the European Union (EU), travelling across the Mediterranean Sea or overland through Southeast Europe.  These people included asylum seekers, but also others, such as economic migrants and some hostile agents, including Islamic State militants disguised as refugees or migrants.

First Stadtholderless Period: The First Stadtholderless Period or Era (1650–72; Dutch: "Eerste Stadhouderloze Tijdperk" ) is the period in the history of the Dutch Republic in which the office of a Stadtholder was absent in five of the seven Dutch provinces (the provinces of Friesland and Groningen, however, retained their customary stadtholder from the cadet branch of the House of Orange).  It happened to coincide with the period when it reached the zenith of its economic, military and political Golden Age.  The term has acquired a negative connotation in 19th-century Orangist Dutch historiography, but whether such a negative view is justified is debatable.  Republicans argue that the Dutch state functioned very well under the regime of Grand Pensionary Johan de Witt, despite the fact that it was forced to fight two major wars with England, and several minor wars with other European powers.  Thanks to friendly relations with France, a cessation of hostilities with Spain, and the relative weakness of other European great powers, the Republic for a while was able to play a pivotal role in the "European Concert" of nations, even imposing a "pax nederlandica" in the Scandinavian area.  A convenient war with Portugal enabled the Dutch East India Company to take over the remnants of the Portuguese empire in Ceylon and South India.  After the end of the war with Spain in 1648, and the attendant end of the Spanish embargo on trade with the Republic that had favored the English, Dutch commerce swept everything before it, in the Iberian Peninsula, the Mediterranean and the Levant, as well as in the Baltic.  Dutch industry, especially textiles, was as yet not hindered by protectionism.  As a consequence, the Republic's economy enjoyed its last great economic boom.

Great Divergence (inequality): The Great Divergence is a term given to a period in late 1970s, when income differences increased in the US and, to a lesser extent, in other countries.  The term originated with Nobel laureate, Princeton economist and "New York Times" columnist Paul Krugman, and is a reference to the "Great Compression", an earlier era in the 1930s and the 1940s when incomes became more equal in the US and elsewhere.

Occupation of the Ottoman Bank: The occupation of the Ottoman Bank (Turkish: "Osmanlı Bankası Baskını" , "Raid on the Ottoman Bank"; Armenian: Պանք Օթօմանի գրաւումը , "Bank Otomani k'ravumĕ" "Ottoman Bank takeover") by members of the Armenian Revolutionary Federation (Dashnak Party) took place in Constantinople, the capital of the Ottoman Empire, on 26 August 1896.  In an effort to raise further awareness and action by the major European powers, 28 armed men and women led primarily by Papken Siuni and Armen Garo took over the bank which largely employed European personnel from Great Britain and France.  Stirred largely due to the inaction of the European powers in regard to mass-pogroms and massacres of Armenians instigated by the Sultan Abdul-Hamid II, the Armenian Revolutionary Federation members saw its seizure as their best attempt to bring full attention to the massacres.  The Ottoman Bank, at the time, served as an important financial center for both the Empire and the countries of Europe.

Anglo-Portuguese Treaty of 1891: The Anglo-Portuguese Treaty of 1891 was an agreement between the United Kingdom of Great Britain and Ireland and Portugal which fixed the boundaries between the British Central Africa Protectorate, (now Malawi), and the territories administered by the British South Africa Company in Mashonaland and Matabeleland, (now parts of Zimbabwe), and North-Western Rhodesia (now part of Zambia) and Portuguese Mozambique and also between the British South Africa Company administered territories of North-Eastern Rhodesia (now in Zambia), and Portuguese Angola.  This treaty brought to an end over 20 years of increasing disagreement over conflicting territorial claims in the eastern part of Central Africa, where Portugal has long-standing claims based on prior discovery and exploration but where British citizens set up missions and embryonic trading concerns in the Shire Highlands in what is now Malawi from the 1860s.  These disagreements were increased in the 1870s and 1880s, firstly by a dispute over a British claim to part of Delagoa Bay and by the failure of bi-lateral negotiations between the two countries over the boundaries of Portuguese territories and secondly as a result of the Berlin Conference of 1884–85, which set-out the doctrine of effective occupation.  After the Berlin Conference, Portugal tried to establish a zone of effective occupation linking its colonies in Angola and Mozambique through expeditions making treaties that would establish protectorates over local peoples and obtaining recognition from other European powers.  The relative success of these Portuguese efforts alarmed the British government of Lord Salisbury, which was also under pressure from missionaries in the Shire Highlands, and also Cecil Rhodes, who founded the British South Africa Company in 1888 with the aim of controlling as much of south-central Africa as it could.  For these reasons, and in response to a minor armed conflict in the Shire Highlands, Lord Salisbury issued the 1890 British Ultimatum which required Portugal to evacuate the areas in dispute.  Lord Salisbury refused the Portuguese request for arbitration and, after an abortive attempt to fix the boundaries of their respective territories in 1890, the Anglo-Portuguese Treaty of 1891 was accepted by Portugal under duress.

Scramble for Africa: The "Scramble for Africa" was the occupation, division, and colonisation of African territory by European powers during the period of New Imperialism, between 1881 and 1914.  It is also called the Partition of Africa and by some, the Conquest of Africa.  In 1870, only 10 percent of Africa was under European control; by 1914 it had increased to almost 90 percent of the continent, with only Ethiopia (Abyssinia), the Dervish state (present-day Somalia) and Liberia still being independent.

Supporting paragraphs: Expansionist nationalism Scramble for Africa
Answer: Scramble for Africa