When countries thought they where better than other countries a war broke out.
The area of Bonsia and Herzegovia is mine.
Nationalism caused world war one. Tension rose between Astria-Hungary, and Sebria. They both wanted the territory of Bonsia and Herzegovina.
No its mine.
New weapons are built to help both sides of the war. Some of the weapons are machine guns, poison gas, and tanks. Trenches are also dug to protect the soilders.
I am hiding in a Trench.
Your boats are going down.
German U-boats started to attack the American boats. The Americans didn't like that so they joined the Allied forces.
Stop attacking our boats we are joining the Allied forces.
Germany had to give accept the blame for starting the war. Slash the size of their army. Give up their oversees. Pay millions of dollars in damage.
Can we at least keep our army size.
Vladimir Lenin took control of Russia. he established a communist government.
Russia will now have a communist government.
I no longer have to share a country with Astria.
The German Empire became a fragile republic. Astria and Hungary became their own countries. Poland, Czechoslovakia, Finland, Estonia, Latvia, and Lithuania became independent. World War One changed countries Government and the bordrs of others.
I no longer have to share a country with Hungary.