Answer: 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.
It was popular at the time because it showed Violence, Provactive Sexuality, and tested strict boundaries for the Cinemas at the year of 1960, it also gave the most iconic shower murder scene as well that gave critics and audience a stir.
