Nationalist China was a US ally. Red China entered the war.
North Korea was communist. Red China entered the later in 1950, becoming an ally to North Korea.
Because China is North Korea's ally.
Because the United States had declared war on Japan, Germany's ally.
Korea's primary ally was China, who supplied weapons and soldiers to the Korean Army during a majority of the Korean War. Many would agree that the Soviet Union was also an ally to North Korea, but China certainly made more of an impact.
Canada entered the war as a ally for british troops the minute they entered.
Spain -nova net-
Hubert Pierlot .
Nationalist China was a US ally. Red China entered the war.
North Korea was communist. Red China entered the later in 1950, becoming an ally to North Korea.
Because China is North Korea's ally.
Because Tecumseh was an ally of the British.
Canada, as a dominion of Britain at the time, entered into the war immediately, with British Empire's declaration of war on Germany on the August 6, 1914. Canada was automatically considered part of the war, because of Her status as an ally of Britain, and because she was not able to control certain affairs (as the Constitution was still in Britain - the BNA Act).
France entered the First World War on the 3rd of August, they saw this as an opportunity for Revenge against Germany for the events that took place in Alsace Lorraine. Britain entered the First World War on the 4th of August, in support of it's Ally, and promise to aid and protect Belgium's Neutral standing in the War.
Because the United States had declared war on Japan, Germany's ally.
They entered because they wanted to EDIT: Czechoslovakia never entered World War II. It was annexed by Germany before the war began.
Because Tecumseh was an ally of the British.