I was watching a clip of the American flag being raised in Havana for the embassy re-opening since closing in 1961. There were some retired Marines there who were there when the flag was taken down. One of them had a hat with something about Calcutta in 1961 on his hat.
What happened in Calcutta that he would have this on his hat? I don't see anything about a US military base in Calcutta nor any battles.