There was several factors that led to World War One. One of the major causes of the war was the assassination of Archduke Franz Ferdinand and his spouse.
the attack on pearl harbour on December 7 1941
Factors that led to the German surrender in World War II was the near total annihilation of the their military ability. There was essentially no recourse other than unconditional surrender.
There were 4 main long term causes that led to the outbreak of World War I. These causes included militarism, alliances, imperialism, and nationalism.
Canada, as a dominion of Britain at the time, entered into the war immediately, with British Empire's declaration of war on Germany on the August 6, 1914. Canada was automatically considered part of the war, because of Her status as an ally of Britain, and because she was not able to control certain affairs (as the Constitution was still in Britain - the BNA Act).
Pearl Harbor
Financial motives
unrestricted submarine warfare
Britain's involvement in the war led to the involvement of Canada, because it's a Commonwealth Nation.
No one led Russia after Lenin in World War I. Lenin ended Russia's involvement in World War I by signing the Treaty of Brest-Litovsk in 1918. World War I ended several months later in 1919. Lenin remained fully in power after the war ended.
they guns
The immediate cause was Japan's attack on Pearl Harbor. This caused the US to declare war on Japan, which led to Germany and Italy declaring war on the US.
Part of the Cold War; communist containment.
Post-War labor disputes
avoid mistakes that had led to American involvement in World War I
The October or Bolshevik Revolution of 1917 is the event that ultimately led to the Russian withdrawal from World War 1. The Treaty of Brest-Litovsk in 1918 was the formal end to Russia's involvement.
invasion of ethiopia, invasion of greece, incursions into north africa, declaration of war agains france