USN033
King & Country
The U.S. Navy Infantry Battalion flag was for many decades, the actual flag of the U.S. Navy as a whole.
The flag design of a navy blue, fouled anchor on a white diamond on top of a navy blue field dates back to the mid-late 19th century. Although it was superceded by a whole new design in 1959 this particular flag was in common usage throughout the period these K&C ‘Bluejackets’ represent i.e. the 1920s up until the late 1950s.