The assasination in Sarajevo - the excuse for starting the war.
The first use of poison gas.
The first use of tanks.
There were many other 'main events', but you asked for three.
== == because someone got assaninated
pearl harbor, Hitler ,war
by Gerrnan submarine
-germany takes over the world
The three main axis powers in world war 2 were Germany, Italy and Japan.
world war 1 ended on november 11th
The main trigger was the assassination of Archduke Franz Ferdinand.
world war2 industrial revolution cold war or world war1
The UK The US and the USSR.
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Many events led to world war1 but the main event that started the war was when archduke Franz Ferdinand of austria-Hungary was assassinated by a serbian terrorist Many events led to world war1 but the main event that started the war was when archduke Franz Ferdinand of austria-Hungary was assassinated by a serbian terrorist
During World War Two the USA. was at war with many countries, but the main three were Japan, Nazi Germany, and Italy.