japan
123 countries involved in the war
Countries that were members of the UN (United Nations) sent troops to the war.
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.
I believe that they were involved in the 6 day war with Israel in 1967.
Some countries are not a lot in common , therefore those countries have independence from other countries. Some countries are peace countries so the are not involved with other countries that are in war. Or at the end of a war two countries sign a peace treaty , saying that those countries are independent.
Only Spain and the US were involved.
they got involved in war because the others declared war :)
Europeans (APEX)
They had alliances with countries that were involved.
It is much easier to name the four countries that wereinvolved: Israel, Egypt, Jordan and Syria. Other countries might have gotten involved, but the war was over in six days, before any other country had decided on that.
about 52 countries.