Time Travel Academy 3

A corporation convinces the government to take part in its time travel mission by utilizing the Time Travel Academy.

Their plan was to terraform Mars by going backwards in time 3 billion years and stopping an asteroid from striking Mars; if successful Mars would become like Earth and its resources would be for the taking.

Their plan was solid yet what they didn't anticipate was that in 3 billion years Mars would develop a civilization of its own; a warlike malevolent civilization bent on destroying Earth.