2. 1,760 PlayStation 3s were used to build a supercomputer for the Department of Defense. -- escapistmagazine.com
3. Hundreds of thousands of "General Purpose" vehicles, or "GPs," were made for the U.S. military during World War II for soldiers to transport men and supplies. Today, we know them as "Jeeps."
4. The Department of Defense owns almost 30 million acres of land. -- DOD
5. The United States has nearly 800 military installations overseas. -- DOD
6. According to Military.com, the Navy’s bell-bottom trousers are believed to have been introduced in 1817 to permit men to roll them above the knee when washing down the decks. In addition, the trousers can be used as a life preserver if you knot the legs.
7. The Marine Corps motto is "Semper Fidelis,” Latin for “Always Faithful.”
8. The last time the United States "declared war" was in 1942. -- The Atlantic
9. The U.S. Department of Defense is the nation’s largest employer. -- DOD
10. The U.S. military uses 4.6 billion US gallons of fuel annually. -- Air Force Magazine
11. U.S. military bases overseas do not accept pennies as currency. This practice began in Europe in the 1980s as a means to save money by eliminating the cost to ship the coins. -- Los Angeles Times
12. The U.S. military uses a nearly silent type of Velcro that reduces the ripping noise by over 95 percent. -- Reddit
13. A service member in a designated combat zone or hazardous duty area generally does not have to pay federal income tax on the military pay and reimbursements during his or her service there. -- Internal Revenue Service
14. In 1949, a U.S. Army private first class – known to the payroll department as an E-3 -- took home a monthly check of $99.55 in “basic pay.” That $99.55 came after he had been in the service for two years and had no dependents.
See more fun facts here.