Following Germany's invasion of Poland on September 1, 1939, both the United Kingdom and France declared war on Germany on September 3, 1939. This marked the official start of World War II in Europe, as these nations sought to support Poland and counter German aggression.
Torpedoed in 1915; US responded with a warning; declaring war two years later when that warning was not heeded.
My money would be on Great Britain and Germany
France and Germany.
Two nations that supplied manpower for the Crusades were France and England. Many knights and soldiers from these regions responded to the call for the Crusades, motivated by religious fervor, the promise of land, and opportunities for adventure. Feudal lords often led these troops, contributing to the significant military presence from Western Europe during the campaigns.
During the Cold War, Germany and Korea were two nations that were split. Germany was divided into East Germany (the German Democratic Republic), aligned with the Soviet Union, and West Germany (the Federal Republic of Germany), aligned with the West. Similarly, Korea was split into North Korea, supported by the Soviet Union and China, and South Korea, backed by the United States and its allies. These divisions were emblematic of the broader geopolitical tensions of the era.
The German telegram to Mexico and the sinking of U.S. merchant ships.
Torpedoed in 1915; US responded with a warning; declaring war two years later when that warning was not heeded.
Germany was divided into two separate nations following World War I: East Germany and West Germany.
Germany and Russia
West And East Germany
East Germany and West Germany.
East Germany and West Germany.
Germany and Italy
Russia and Germany.
In response to Austria-Hungary declaring war on Serbia, Russia mobilized its army to support Serbia, viewing itself as a protector of Slavic nations. This mobilization was seen as a direct threat by Germany, which had promised to support Austria-Hungary. Consequently, Germany declared war on Russia on August 1, 1914, as part of its strategy to engage in a two-front war against both Russia and France, escalating the conflict into World War I. This chain of events intensified tensions in Europe and drew multiple nations into the war.
East & West Germany
Germany