Military Services and other DOD Components have many other protected insignia that are both graphic and word marks. Some of those marks include, but are not limited to, the United States Army; United States Marine Corps; United States Navy; United States Air Force; United States Coast Guard, and United States Space Force.
Each Military Service has a Trademark Licensing Program Office that manages not only the Military Service headquarters' trademarks but also unit insignia. These emblems, coats of arms, initials, symbols and other military identifiers may not be used
without prior written permission. Some Military Service slogans and acronyms may also be protected and require prior written permission before use.
DOD Trademark Licensing Guide
"This activity supports the U.S. military and its veterans; however, it is not officially connected to or endorsed by the U.S. Department of Defense or any of its branches."