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they donated condoms
not sure
During World War 1 the United States government took control of all the railroads. This nationalized system was called The United States Railroad Administration.
Easy, think about it - without World War 1, World War 2 would never have happened...! Therefore, WW1's contribution to history was WW2...!
World War 1, World War 2, Indian Independence, Green Revolution, Bhangra,
Actually, France's largest contribution was unintentional. She furnished most of the battlefields!
Canada's contribution to World War 2 was more logistical than their contribution to World War 1. They supplied food, ammunition and other necessities to the soldiers. In World war 1, they contributed by fighting along the Western Front with the help of the French and British troops. They fought against the Germans along the Western Front.
Helping the injured soilders get the safety
China's contribution in the First world war involved sending coolies to France and England to work in the munition's factories.
They learnt a number of things, such as women contribution to war, technology, war tanks, aeroplanes, weapons, potlitics, ways to make money...
Soldiers from other countries.
I don't think it did because most of the fighting took place either in England or the Atlantic ocean.