> Although the narrative of Captain America is that he enlisted in the 40's so chances of him having a turban and a beard are really really low
Interestingly, one of the first known Sikhs in the US army was Bhagat Singh Thind[1] during the first world war. He was also involved in a legal battle[2][3] for naturalization which eventually lead to the landmark decision to allow "non-whites" to naturalize as US citizens.