Shoot the enemy and travel through the galaxy! They attempt to use their force to rule the Earth and the solar system. People on the Earth fight back, using three types of plane-fighter jets, which are newly developed and equipped with modern weapons, to start fighting back.
As is human nature, it did not take long for power struggles to arise between the colonies. Dictators, with whole armies took over each planet and ruled them with iron fists. War was the next step.