Kishin Corps: Alien Defender Geo-Armor

Kishin Corps (機神兵団) is a mecha anime directed by Takaaki Ishiyama and Kazunori Mizuno. It is a work of alternate history, taking place in 1941 during World War II. An alien race invades the earth and allies with the axis powers. To combat these aliens an elite allied unit called the Kishin Corps is created, using alien technology. The story deals with the main character Taishi, who obtains a secret alien device from his father, which the Germans are after to build their own robots.