From Macross Compendium

Destroid is the general name for the large-humanoid ground-combat weapon that adapted advanced technology from OTM (OverTechnology of Macross). It was developed along with the VF (Variable Fighter) on the assumption that it would come into combat with giant aliens. Unlike the VF, which was based off an aircraft, the Destroid is a non-transforming AFV (Armored Fighting Vehicle) whose heavy armor and firepower far surpassed a VF. Research and development was supported by the UN Army, unlike the VF, which was supported by the UN Navy, Air Force, and Marines.