Hello Scavenger_120 could you make GATE react to d day tribute here is the video link (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hxtF8_Tkq5M.html)
Maybe I can help you that: Try anime called OBSOLETE, this will do for you have ran out of ideas or perhaps Death Kreig or Space Marines from Warhammer 40k.