For most people, playing Call of Duty‘s campaign mode is as close as they’ll get to joining the military. For them, the everyday realities of uniformed service are unknown. But shining a light on this world are ordinary servicemen and women, and they’re using an unusual tool to do it. For reasons I’ve yet to discern, the Chinese video sharing app (and bonafide teen sensation) TikTok is immensely popular with members of the military, who use it to share viral memes, perform “duets” with other users, take part in challenges, and share snippets of their day-to-day duties. These videos tend…

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