Austria had taken advantage of Russia's problems in the wake of defeat in the Russo-Japanese War to annex Bosnia-Herczegovina in 1908. At that point Russia was unable to act, however, they did determine not to allow Austria to make any further such gains in the Balkans. When Austria issued the ultimatum to Serbia in 1914, and threatened to attack, Russia warned Austria and started a partial mobilization themselves. This is were the system of alliances kicked in, because Germany mobilized in reaction and ultimately declared war on both Russia and France (France had an alliance with Russia).
One is tempted to respond "read a history book", but the short answer is: because Germany declared war against them. This wasn't entirely without provocation, mind you, which is where the history book would come in handy.
Essentially: Germany supported Austria-Hungary, while Russia was friendly with and supported Serbia. When the Heir Apparent of Austria-Hungary was assassinated by Serbian militants, Austria-Hungary and Germany began preparing for war with Serbia, and Russia began mobilizing its forces to support Serbia. The Germans objected to this mobilization, and eventually declared war on Russia.
There's a whole lot of stuff left out in there, but really, it all boils down to a complex web of alliances and preferences with, ultimately, the Triple Alliance (Germany, Austria-Hungary, Italy) on one side, and the Triple Entente (Russia, France, Britain) on the other, and a bunch of minor players like Bulgaria and Serbia on the sidelines egging them both on.
Russia declared war on Austria-Hungary to support their ally Serbia. This forced Germany to declare war on Russia to support their ally Austria-Hungary.
Russia is a Slavic country, and it entered WW1 to come to the aid of fellow-Slavs, the Serbs, who were being attacked by Germany and Austria-Hungary.
USSR truly entered the war with the invasion of Russia. They were wasting the time with the Russo-Finnish war.
Russia was part of the Soviet Union, they were Allies of France, England , Canada and the USA (the USA did not enter the war until 1941, 3 years after the war began)
they made a peace treaty and it all worked out.
World War 1 left Russia's economy in complete devastation. By the end of the war Russia had 8,000,000,000 rubles of debt.
World War 1 Germany invaded Russia in 1917 after Russia backed out of the war. World War 2 Germany invaded Russia during the Second World War on June 22, 1941 Operation Barbarossa
Because Germany declared war on Russia On 1st August 1914
June 21st 1914
USSR truly entered the war with the invasion of Russia. They were wasting the time with the Russo-Finnish war.
no, Russia entered the world war two because Germany broke the alliance between them (when the German Army invaded Russia)
Russia was part of the Soviet Union, they were Allies of France, England , Canada and the USA (the USA did not enter the war until 1941, 3 years after the war began)
US Congress declared war on Germany on 6th April 1917
Technically, the Russian Empire fought in World War One, while the U.S.S.R. fought in World War Two. In both wars, it fought on the side of the Allies.
they made a peace treaty and it all worked out.
Russia joined world war 1 in 1914
they trolled them so they can finally enter the war
On April 26th 1915, Italia came into the war on the side of the Triple Entente - Britain, France and Russia
World War 1 left Russia's economy in complete devastation. By the end of the war Russia had 8,000,000,000 rubles of debt.