Try googling "Maschinen Krieger" (two separate words).
According to Our Friend, Wikipedia:
"Maschinen Krieger ZbV 3000 is a science fiction universe created by Japanese artist and sculptor Kow Yokoyama in the 1980s. It originally began as the science fiction series SF3D which ran as monthly installments in the Japanese hobby magazine Hobby Japan. To develop the SF3D storyline, Kow collaborated with Hiroshi Ichimura (story editor) and Kunitaka Imai (graphic designer). The creators drew visual inspiration from their combined interest in WWI and WWII armor and aircraft."
"The story is set 880 years in the future. Events primarily take place between the years 2882 and 2886. A nuclear World War in 2807 destroys most of Earth's population, and renders the planet uninhabitable. About 50 years after the destruction, the Galactic Federation (details unknown) sent an investigative team to determine the condition of the planet. They discover the planet has restored itself to a natural paradise and begin the process of sending colonists to populate Earth. The colonists prospered on the reborn Earth. Cities and towns are eventually reformed, but this growth attracts the attention of criminals, AWOL soldiers, political criminals, mercenaries, terrorists, and other people who had decided to leave civilized society, who began to make their way back to Earth as a suitable place for refuge. The Colonists had no real form of government to deal with the problem other than a few local militias. The GF, concerned about the civil unrest and the Colonists forming their own independent government, gave the Strahl Democratic Republic (SDR) the right to govern the planet. The SDR's hard handed tactics to restore order; travel restrictions, hard labor camps for the unemployed, etc., created great resentment amongst the Colonists. The Colonists create the Earth Independent Provisional Government and declare independence from the Strahl Republic. The SDR immediately forms a puppet government and attempts to quell the uprising. The wealthy Colonists hire the mercenaries to form the Independent Mercenary Army. They attack the SDR forces and the war for independence and the control of the Earth begins."