It's hard to imagine that a global catastrophe could be the inspiration for great music, but in the case of the Vietnam conflict, that's just what happened. The soundtrack to the conflict reflected not only what was going on in Vietnam, but also the unrest back home, where anti-war sentiment reached a fever pitch as the 1960s came to a close. The songs capture the spirit of the time; some, released years later, deal with the lingering effects of the conflict. But for those in battle, many of these songs were simply a link to a home they missed and longed for. Some of the songs vigorously skewer patriotism, while others express a wistful yearning for a more peaceful world. Here are the most well-known - and a few that may surprise you.