Different military forces have their own coin that serves as a memorabilia for honoring guests and members during special occasions. A military coin is also known as a challenge coin, a unit coin or a commander’s coin. Usually these stand proof an individuals’ membership and support as well as patronage of bearer. You can find especially minted coins that endorse unit spirit. Generally a unit coin bears a squadron or a unit’s emblem or logo. During special programs, a military unit can gift their guest of honor a special military coin to show their gratitude and high esteem for the guest.