answersLogoWhite

0

The countries sending the most troops were (in order) Russia, France, UK, Italy, and the USA. As a percentage of their population, Serbia, France, Montenegro, Italy, UK, New Zealand, and Romania sent over 10% of their population to war. Russia, France, UK, and Italy had more than a million casualties. The UK and European countries become involved not by choice. Those that chose to get involved, and in the order that they joined the war, were Canada, Australia, New Zealand, and finally the USA in 1917.

What else can I help you with?