The Central Powers, also known as the Central Empires, were one of the two main coalitions that fought in World War I (1914–1918). It consisted of the German Empire, Austria-Hungary, the Ottoman Empire, and Bulgaria; this was also known as the Quadruple Alliance.
A series of military conflicts between the Ottoman Empire and various European states took place from the Late Middle Ages up through the early 20th century. The earliest conflicts began during the Byzantine–Ottoman wars, waged in Anatolia in the late 13th century before entering Europe in the mid-14th century with the Bulgarian–Ottoman wars. The mid-15th century saw the Serbian–Ottoman wars and the Albanian-Ottoman wars. Much of this period was characterized by Ottoman expansion into the Balkans. The Ottoman Empire made further inroads into Central Europe in the 15th and 16th centuries, culminating in the peak of Ottoman territorial claims in Europe.
In diplomatic history, the Eastern question was the issue of the political and economic instability in the Ottoman Empire from the late 18th to early 20th centuries and the subsequent strategic competition and political considerations of the European great powers in light of this. Characterized as the "sick man of Europe", the relative weakening of the empire's military strength in the second half of the eighteenth century threatened to undermine the fragile balance of power system largely shaped by the Concert of Europe. The Eastern question encompassed myriad interrelated elements: Ottoman military defeats, Ottoman institutional insolvency, the ongoing Ottoman political and economic modernization programme, the rise of ethno-religious nationalism in its provinces, and Great Power rivalries. In an attempt to triangulate between these various concerns, the historian Leslie Rogne Schumacher has proposed the following definition of the Eastern Question:
The "Eastern Question" refers to the events and the complex set of dynamics related to Europe's experience of and stake in the decline in political, military and economic power and regional significance of the Ottoman Empire from the latter half of the eighteenth century to the formation of modern Turkey in 1923.
Russo-Turkish wars or Russo-Ottoman wars were a series of twelve wars fought between the Russian Empire and the Ottoman Empire between the 16th and 20th centuries. It was one of the longest series of military conflicts in European history. Except for the war of 1710–11, as well as the Crimean War which is often treated as a separate event, the conflicts ended disastrously for the Ottoman Empire, which was undergoing a long period of stagnation and decline; conversely, they showcased the ascendancy of Russia as a European power after the modernization efforts of Peter the Great in the early 18th century.
Tao is a historical Georgian district and part of historic Tao-Klarjeti region, today part of the Eastern Anatolia region of Turkey. Its name derives from the ancient proto-Georgian inhabitants of this area, known as Taochi.
The military history of Romania deals with conflicts spreading over a period of about 2500 years across the territory of modern Romania, the Balkan Peninsula and Eastern Europe and the role of the Romanian military in conflicts and peacekeeping worldwide.
The Revolutions of 1917–1923 were a revolutionary wave that included political unrest and armed revolts around the world inspired by the success of the Russian Revolution and the disorder created by the aftermath of World War I. The uprisings were mainly socialist or anti-colonial in nature. Some socialist revolts failed to create lasting socialist states. The revolutions had lasting effects in shaping the future European political landscape, with for example the collapse of the German Empire and the dissolution of Austria-Hungary.
