In 1972, the Apollo 17 mission stumbled upon a game-changing discovery while exploring the moon - a hypergate which opened up a pathway to Mars. Upon arriving on the red planet, the astronauts uncovered a potent substance named 'Aldnoah' that bestowed them with an unparalleled level of power. This triggered an exodus from Earth, ensuing in the formation of a new civilization referred to as the 'Martians'. Princess Asseylum, the esteemed leader of Mars, embarked on a journey to Earth with the aim of forging a harmonious relationship between the two planets. But before long, tensions boiled over, leading to a fierce battle that pitted Mars against Earth. In this altercation, colossal, metallic creatures bellowed down from the sky, manned by Martian forces hell-bent on eradicating humanity.