The card above is from WWI, which I only buy soldier’s mail from WWI when I find cards in quarter boxes. This card isn’t even soldier’s mail, it is unused, but I thought the image was really neat. You can see sailors helping to dock the ship, the old American flag, etc. The text says “”Devil Dogs” U.S.S. Marines arriving Naval Base Hampton Roads, VA: U.S.A. Returning over sea service August 8- 1919 U.S.S. Sidney Troop Ship.”
A quick Google search reveals that the nickname “Devil Dogs” is derived from the Germans calling the Marines “Dogs from Hell” at the Battle of Belleau Wood, which took place in June 1918.