The U.S. military had a long tradition of glorious beards — until WWI when the need for properly sealed gas masks outweighed the benefits of intimidation through superior facial hair. Today, deployed special-operations troops and troops in outlying FOBs or submarines have some leniency, but it all depends on what your rank and unit can afford. Exceptions can be made for religious or medical reasons, but the average Joe will need to shave every day.
The salt sprinkled on the wound is watching our allies grow beards that put every hipster to shame. But just because they can grow a beard, doesn’t mean that they don’t have a standard to follow. Every nation’s armed force has a different policy.
Some only allow a neatly trimmed pencil mustache, like the Americans, while others only allow their Navy to sport beards. Some only allow neatly trimmed beards if they’re properly cared for and remain a certain length and others just say, “f*ck it,” and let their boys look like lumberjacks.