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EponymousKid
Since: Jan, 2001
23rd Jan, 2011 08:59:10 AM
You're in luck, I happened to watch this just the other day (though it was a nostalgia thing, since I'd seen it when I was a kid) - It's definitely Mobile Suit Gundam The08th MS Team.
I believe it was an anime set in the gundam universe or some other giant robot series though I could be wrong... It opened with two astronauts meeting in space (I think) and one of them loses their watch. They turn out to be on opposite sides of a war... The show ends with them emerging from a cave after the final battle of the war, and if I remember correctly the guy lead lost a leg.