Kaiser Wilhelm II in the context of "House of Hohenzollern"

In the field of international relations, a sphere of influence (SOI) is a spatial region or concept division over which a state or organization has a level of cultural, economic, military, or political exclusivity.

While there may be a formal alliance or other treaty obligations between the influenced and influencer, such formal arrangements are not necessary and the influence can often be more of an example of soft power. Similarly, a formal alliance does not necessarily mean that one country lies within another's sphere of influence. High levels of exclusivity have historically been associated with higher levels of conflict.

The Weimar Republic was a historical period of the German state from 9 November 1918 to 23 March 1933, during which it was a constitutional republic for the first time in history. The state was officially named the German Reich; it is also referred to, and unofficially proclaimed itself, as the German Republic. The period's informal name is derived from the city of Weimar,where the republic's constituent assembly took place. In English, the republic was usually simply called "Germany", with "Weimar Republic" (a term introduced by Adolf Hitler in 1929) not commonly used until the 1930s. The Weimar Republic had a semi-presidential system.

At the end of the First World War (1914–1918), the German Empire was economically and militarily exhausted and sued the Allies for peace. Awareness of an imminent defeat sparked the German revolution, the abdication of Kaiser Wilhelm II, the collapse of the Empire and the proclamation of the Weimar Republic. Hostilities in the war formally ceased with the Armistice of 11 November 1918.

The century of humiliation (simplified Chinese: 百年国耻; traditional Chinese: 百年國恥; pinyin: bǎinián guóchǐ) was a period in Chinese history beginning with the First Opium War (1839–1842), and ending in 1945 with China (then the Republic of China) emerging out of the Second World War as one of the Big Four and established as a permanent member of the United Nations Security Council, or alternatively, ending in 1949 with the founding of the People's Republic of China. The century-long period is typified by the decline, defeat and political fragmentation of the Qing dynasty and the subsequent Republic of China, which led to demoralizing foreign intervention, annexation and subjugation of China by Western powers, Russia, and Japan.

The characterization of the period as a "humiliation" arose with an atmosphere of Chinese nationalism following China's defeat in the First Sino-Japanese War of 1894–1895 and the subsequent events including the scramble for concessions in the late 1890s. Since then the idea of national humiliation became a focus of discussions among many Chinese writers and scholars, although they differed somewhat in their understandings of national humiliation; ordinary scholars and constitutionalists also had different understanding of their home country from the anti-Qing revolutionaries in the late Qing period. The idea of national humiliation was also mentioned in late Qing textbooks.

Frederica of Hanover (German: Friederike Luise; Greek: Φρειδερίκη Λουΐζα, romanized: Phreideríkē Louḯza; 18 April 1917 – 6 February 1981) was Queen of Greece from 1 April 1947 until 6 March 1964 as the wife of King Paul and the Queen Mother of Greece from 6 March 1964, when her son Constantine II became King, until 8 December 1974, when the monarchy was officially abolished after a referendum.

Granddaughter of Kaiser Wilhelm II and daughter of Duke Ernest Augustus of Brunswick, Frederica was born a few months before the fall of the German Empire. Her family overthrown, she grew up between Austria and Weimar Germany, where her father owned large properties. As a teenager, she joined the Hitler Youth in 1933, before leaving to complete her studies for the next two years in the United Kingdom and then Italy. In Florence, she was received by Princess Helen of Greece and Denmark, at whose house she met the Crown Prince of Greece, Paul. The two fell in love and married two years after the restoration of the monarchy in Greece. In the years that followed, she gave birth to three children, Sophia in 1938, Constantine in 1940 and Irene in 1942.

The Junkers (/ˈjʊŋkər/ YUUNG-kər; German: [ˈjʊŋkɐ]) were members of the landed nobility in Prussia. They owned great estates that were maintained and worked by peasants with few rights.‍ These estates often lay in the countryside outside of major cities or towns. They were an important factor in Prussian and, after 1871, German military, political and diplomatic leadership. One of the most famous Junkers was Chancellor Otto von Bismarck.‍ Bismarck held power in Germany from 1871 to 1890 as Chancellor of the German Empire; he was dismissed by Kaiser Wilhelm II.‍

Many Junkers lived in the eastern provinces that were annexed by either Poland or the Soviet Union after World War II. Junkers fled or were expelled alongside other German-speaking populations by the incoming Polish and Soviet administrations, and their lands were confiscated. In western and southern Germany, the land was often owned by small independent farmers or a mixture of small farmers and estate owners, and this system was often contrasted with the dominance of the large estate owners of the east. Before World War II, the dividing line was often drawn at the river Elbe, which was also roughly the western boundary of Slavic settlement by the Wends in the so-called Germania Slavica prior to Ostsiedlung. The term for the Junker-dominated East was thus Ostelbien, or 'East Elbia'. They played a prominent role in repressing the liberal movement in Germany, and were often described as reactionary.

The High Seas Fleet (German: Hochseeflotte) was the battle fleet of the German Imperial Navy and saw action during the First World War. In February 1907, the Home Fleet (Heimatflotte) was renamed the High Seas Fleet. Admiral Alfred von Tirpitz was the architect of the fleet; he envisioned a force powerful enough to challenge the Royal Navy. Kaiser Wilhelm II, the German Emperor, championed the fleet as the instrument by which he would seize overseas possessions and make Germany a global power. By concentrating a powerful battle fleet in the North Sea while the Royal Navy was required to disperse its forces around the British Empire, Tirpitz believed Germany could achieve a balance of force that could seriously damage British naval hegemony. This was the heart of Tirpitz's "Risk Theory", which held that Britain would not challenge Germany if the latter's fleet posed such a significant threat to its own.

The primary component of the Fleet was its battleships, typically organized in eight-ship squadrons, though it also contained various other formations, including the I Scouting Group. At its creation in 1907, the High Seas Fleet consisted of two squadrons of battleships, and by 1914, a third squadron had been added. The dreadnought revolution in 1906 greatly affected the composition of the fleet; the twenty-four pre-dreadnoughts in the fleet were rendered obsolete and required replacement. Enough dreadnoughts for two full squadrons were completed by the outbreak of war in mid-1914; the eight most modern pre-dreadnoughts were used to constitute a third squadron. Two additional squadrons of older vessels were mobilized but later disbanded.