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The leader of Nazi Germany Adolf Hitler (1889-1945) ordered the invasion of Poland on 1 September 1939. Hitler's refusal to withdraw brought a declaration of war from Britain and France on 3 September, and so began...

Adolf Hitler (1889-1945), the leader of Nazi Germany, was intent on attacking the USSR in the summer of 1941. With Western Europe subdued in 1940, Hitler could finally pursue his dream of territorial expansion in the...

According to UNESCO, an estimated three million shipwrecks are scattered in the oceans’ deep canyons, trenches, and coral reefs and remain undiscovered. These shipwrecks preserve historical information and provide...

Europe is a continent forming the westernmost part of the land mass of Eurasia and comprised of 49 sovereign states. Its name may come from the Greek myth of Europa, but human habitation of the region predates that tale, going back over...

Napoleon's invasion of Russia, also known as the Second Polish War or, in Russia, as the Patriotic War of 1812, was a campaign undertaken by French Emperor Napoleon I (r. 1804-1814; 1815) and his 615,000-man Grande...

The Messerschmitt Bf 109, also known as the Me 109, was Germany's most important single-seater fighter plane throughout the Second World War (1939-45). Produced in greater numbers than any other German plane, the fighter was...

The German-Soviet War, known in the USSR and today's Russia as the Great Patriotic War or, in Western Europe, as the Eastern Front of the Second World War (1939-45), began in June 1941 with Operation Barbarossa...

The Treaty of Brest-Litovsk, signed on 3 March 1918, outlined the harsh conditions under which the crumbling Russian Empire withdrew from the First World War (1914-18). Negotiated by Vladimir Lenin (1870-1924), the leader...

Gustavus Adolphus (l. 1594-1632; r. 1611-1632) was the King of Sweden who elevated his country to a major power in the 17th century. He also is traditionally recognized as the "Father of Modern Warfare" for his military innovations...

The Northern or Baltic Crusades were military campaigns organised by popes and western rulers to convert pagans to Christianity in the 12th to 15th century. Unlike in the Holy Land, where military campaigns were aimed at liberating...