Kishin Heidan
English title: Kishin Corps
Japanese title: 機神兵団
Alternative titles: Alien Defender Geo-Armor - Kishin Corps, Machine-God Corps, Panzer Robot
Type: OVA
Source: Novel
Episodes: 7
Status: Finished Airing
Aired: Mar 25, 1993 to Aug 25, 1994
Duration: 33 min per ep
Rating: PG-13 - Teens 13 or older
Studios: AIC
Producers: Pioneer LDC
Licensors: Geneon Entertainment USA
Genres: Adventure, Sci-Fi
Themes: Historical, Mecha

October 1941, as the second World War threatens to destroy the civilized world, an unforeseen complication suddenly occurs. An alien invasion! Despite the sudden appearance of these extraterrestrial aggressors, the Axis and Allies continue their destructive conflict. Only the Kishin Corps and their giant Geo-Armor Robots (a.k.a.: Kishin), developed from a captured alien robot soldier, stand between the Earth and total annihilation!

A teenager, named Taishi, suddenly finds himself at the center of a struggle over a mysterious black attaché case entrusted to him by his father, Professor Tokamura. The case contains the controlling mechanism for one of the giant Geo-Armor Robots, and the Japanese Kanto Army, the alien invaders, and the Kishin Corps all want to recover the device! Between the spies, the armies, the aliens, and the Giant Robots, Taishi is in for an epic adventure—if he can survive it!

(Source: AnimeNfo)