#OTD in 1921, 2,200 Marines were deployed across the nation to protect the U.S. Mail after gangsters had committed a rash of robberies. The iconic Thompson submachine gun ("Tommy gun") was put into service for the first time when it was issued to the USMC and Postal Inspectors.
https://twitter.com/NavalInstitute/status/1325185135218552832
I love this tweet soooo much