http://tvtropes.org/pmwiki/pmwiki.php/Laconic/FireEmblemAwakening

An amnesiac tactician helps a Lord fight tyrants, mad cultists, a Zombie Apocalypse, and an evil dragon hell-bent on laying waste to the world with the help of children from the Bad Future where it all did happen.

Also, the one with Robin and Lucina. And Chrom.