Disclaimer: This is my first forum game, but not my first DM experience by any measure, be aware that I am mostly testing the waters here.
The Third World War raged for a decade, at the end there stood two vast military nations, The Union, and the Empire. After years of bickering and border conflicts over our mother planet's dwindling resources, the two nations finally dispensed with all pretense and began an all-out war. After the dust settled, neither nation remained intact, both were broken unsustainable wrecks. Ten years later they collapsed into the second dark age. Over the intervening generations some was lost, but humanity prevailed. The society that emerged from the long darkness was a unified people of Earth, but the damage wrought by the last war was catastrophic, the crushing pressure of 42 billion humans forced rapid expansion into new frontiers, the depths of the terrestrial oceans and the vastness of the Sol system were ruthlessly subjugated to Earth's needs.
Humanity expanded outwards, mastering basic FTL systems they reached new worlds, and driven by relentless population expansion they claimed them. Terraforming technologies developed at a meteoric pace, husks of dead rock became vibrant worlds home to billions, asteroid belts provided raw materials for the birth of whole planets. But, as all expansions, eventually ours too came to a halt.
They called themselves Ocurai, a word meaning 'destined', and they acknowledged no equals in the universe. The systematic destruction of humanity was planned before our linguists could even decipher their language, the first wave launched before our diplomats arrived to open lines of communication, and the devestation was total. From several trillion humans spread across a hundred systems, to two lonely worlds in under a year.
Mars colony Labyrinthus Noctis: 2206 AD
Your head hurts, breathing is difficult, the smell of burning plastic fills your nostrils. Your left side is hot, your right abdomen is cold, shattered bones grate in your right leg. You hear a hissing sound in your right ear, and ringing in your left ear. You cannot see from your right eye, you are having trouble focusing with your left eye. The cockpit is hazy, and you can barely make out the instruments, an alarm is sounding.
Status: Injured but functional, probable concussion, broken leg, numerous minor injuries.
Location: some vehicle's cockpit, somewhere on Mars.