World War II Patriotic cover
"Mr. Jap, You'll Be Sorry! We Will Avenge Pearl Harbor!"
A Marine holding a rifle underscores the message in this thermographed cachet by Walter G. Crosby of San Pedro, California. This serviceman's cover was sent under Free Franking from the U. S. Army's Camp Crowder, Missouri. Postmarked Camp Crowder, Missouri, August 9, 1942.