The United States Military is not known for being touchy-feely. There’s not much hugging or head-patting, and superiors don’t always have the authority to offer a serviceman a raise or promotion.
When a member of the Army, Navy, Air Force, Marine Corps, or Coast Guard wants to show appreciation, love, sympathy, or professional connection, they can use challenge coins.
Challenge coins are not currency. Different branches of the military have different uses and customs for them, but when they’re being given or exchanged, the coins serve as literal tokens of gratitude. They can symbolize everything from a nod of appreciation to a deep personal connection.