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Austria and Hungary take over Croatia
Austria and Hungary had united as one and had taken over Croatia. -
Bosnia
Austria and Hungray had taken over Bosnia. -
Lewis Gun
Lewis Gun. It's an america ligthmachine gun that was introduced to the war in 1911. -
Franz and Gavrilo
Gavrilo Princip had assasinated Franz Ferdinand. -
Gas
Chlorine gas had been first introduced to the war in 1914. -
Tanks
In 1915 the first tank in world war 1 had been used. -
Gallipoli
The battle of Gallipoli had taken place in 1915. -
Turkey
In 1915 turkey had decided then to join the war. -
Somme
The battle of Somme toke atleast 4 months. 1,000,000 men were either wounded or killed which made it one of the biggest battles in the war. -
Submarines
The first submarines had been introduced to the war in 1917. -
America
In 1917 America had entered the war.