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Answer this question… Russia had an alliance with Serbia, and Germany had an alliance with Austria-Hungary.
Well Serbia kill Austria-Hungary's beloved Arch Duke Franz Ferdinand. Austria-Hungary then declared war on Serbia; Russia (good alliance w/ Serbia after the helped Serbia declare their independence from the Ottoman Empire) stepped in to help & declared war on Austria Hungary. Germany (alliance to Austria Hungary) declared war on Russia and France (French had military agreement w/ RUssia). Then Germany invaded Belgium (Great Britain territory) to get to France, so great Britain got involved. THen the US saw the alliance powers were losing, so we sent them supplies and Germany sunk our ships, so the US joined in. Italy (alliance to Germany and Austria Hungary) saw the alliance powers were winning (France, Serbia, Russia, ect) and joined in to help them out.
The war started on July 28 1914, Serbia was in alliance with Russia.improved:and russia, was in alliance with Britain and France. (the triple entente).Germany, austria-Hungary and Italy were also in an alliance (the triple alliance).
Germany, Austria/Hungary, and Italy by the Triple Alliance!!
Imagine two big gangs, Franz Ferdinand gets shot, Austria threaten's Serbia with invasion if her demands are not met, Serbia is friends with Russia Russia offers help is Serbia gets invaded Germany offers help to Austria if the Russains aid Serbia Russia is allied with France Germany is allied with Turkey So Austria invaded Serbia, Russia declares war on Austria, Germany declares war on Russia, France gets involved, So as you can see the two big alliances designed so there could never big a big war failed, because once war was declaired all sides had to back there own alliance.
The assassination of Austrian Archduke Ferdinand was the immediate cause of World War I. He was killed by a Serbian terrorist, which caused Austria to declare war on Serbia. Serbia was allied with Russia, who intervened, causing Germany to declare war on Russia, which caused France to declare war on Germany.
Germany guaranteed Austria-Hungary its support in the conflict with Serbia.
Because Germany declared war on Serbia, russia mobilized its army to protect Serbia due to an old alliance
Germany was the first country to declare war on Serbia in World War 1. The other countries were pulled into the war because the had alliances with either Serbia or Germany.
Civic Alliance of Serbia was created in 1992.
Civic Alliance of Serbia ended in 2007.
Russia declaring war on Germany to protect its ally Serbia.