Tenkuu no Escaflowne, Break Blade 1: Kakusei no Toki Recommendations
A territorial war for "natural" resources / energy crystals. A unique Mecha. Half-hearted love story with triangles. War, sadness, deaths
Magic Mecha in a pseudo Medieval setting, with themes of the devastation of war and how it tears people apart. Both well animated with interesting characters and story lines.