What was the reason that thousands of japanese americans voluntarily joined the us military during world war ii?

To show loyalty to the U.S., gain upward mobility and/or Citizenship

Explanation: During World War II, many Americans of Japanese descent volunteered to join the U.S. military. This was in spite of growing sentiments against them as well as internment of Japanese Americans in camps.

It was a way to show loyalty to the U.S. For some it was the only way to gain citizenship, as well as move up the social ranks as ethnic minority groups had limited rights. They were first rejected, with the exception of bilingual Japanese Americans who helped with translation and interrogation.

d. the right to establish a one-house legislature

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.