Venus Senki

In the 21st century, mankind lives on two worlds. Following the collision of an ice asteroid, massive terraforming has made Venus a planet now capable of supporting life. Colonists from Earth tamed the hostile world and have thrived for four generations. But they also brought the darker side of humanity. Venus is about to become hostile again.
Hiro Seno, a hotshot motorcycle jockey, witnesses the first strike against his country Aphrodia, by the rival nation of Ishtar. Huge battle tanks and war planes quickly lay waste to the city. The Aphrodian army is quick to mobilize and retaliate... and despite his opposition to warfare, Hiro finds himself fighting for his life on the front lines.