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.
noone
Because most of the major countries of the world were involved in the fighting.
Nearly all the major nations were involved in World War 2.
World War 1 left the countries that were involved with a major distrust of people from other countries. Resentment was caused in countries such as Germany and Italy who lost land during the war.
world war 1 is the first world war. Nearly all countries were involved in the fighting. The Major countries were Germany France and Brittan
britan germany and france
Both were total wars that involved countries' entire populations.
The US was across an ocean from the European countries, which was a major reason why they decided to stay out of war.
The main countries involved in World War 2 (1939 - 1945) (there were a lot more countries involved, but these are the major ones): Germany, Russia, Britain, United States, France, Italy and Poland. The main countries involved in the Cold war (started roughly in the late 1940s): United States, USSR (Russia), Britain
yes
The Allies and the Entente.
World War two was a major war in human history. It lasted about 6 years, many countries were involved. Mainly divided into Allies and Axis. The Allies side won the war.
There were not only two countries.