USA HISTORY

Detailed explanation-1: -Russia got involved because Russia had an alliance with Serbia. Germany then declared war on Russia because Germany had an alliance with Austria-Hungary. Britain declared war on Germany because of its invasion of neutral Belgium. Britain had agreements to protect both Belgium and France.

Detailed explanation-2: -Though their significance is often misunderstood or exaggerated, alliances are one of the best-known causes of World War I. While alliances did not force nations to war in 1914, they nevertheless drew them into confrontation and conflict with their neighbours.

Detailed explanation-3: -Militarism could have cause the war due to the naval and arms race. The main event of Militarism causing World War one was the naval rivalry which was made after 1900. Britain had the most powerful navy in the world. The new Keiser Wilhelm announced his intention to build a bigger German navy than Britain.

Detailed explanation-4: -The Alliances in 1914 Germany and Austria-Hungary had been close for a half century. Each agreed to support the other in case of war. The addition of Italy (despite its tensions with Austria-Hungary) formed the Triple Alliance. On the other side, France broke its isolation by allying with Russia.