Prologue:

In the early 21st century, humanity's technological progression seemed to be grinding to a halt. Predictions foretold a stagnant future, with little hope for breakthroughs in the coming decades. But in 2063, Dr. Sheldon Cooper and his wife, Dr. Amy Cooper, forever altered the course of science with their groundbreaking mathematical model for String Theory. Their research sparked a revolution in the scientific community, confirmed by an experiment orchestrated by Dr. Leonard Hofstadter, with the help of Dr. Rajesh Koothrappali and engineer Howard Wolowitz. This monumental discovery was hailed as the "breakthrough of all scientific breakthroughs," unlocking humanity's understanding of the universe and the very fabric of nature itself.

In 2090, the discovery of Kibbler Element (KEL) on Mars, named after the geologist Bertram "Bert" Kibbler, sent shockwaves through the scientific world. This newly discovered element, abundant on Mars and incredibly durable, combined with the principles of String Theory, accelerated technological advancements at an unprecedented pace. KEL's potential was a marvel, but its impact rippled into global politics. Nations, once allies, now found themselves at odds, each vying for control of the resources on Mars. Tensions escalated, and the world teetered on the edge of World War III. The political landscape shifted as alliances fractured, and chaos loomed large.

By 2122, the Global Science Group's Rigma Station received a mysterious signal from deep space—an alien cry for help. The Arkard, a dying species, sent a desperate plea from their besieged homeworld of Arkurid, where the Marikar Empire waged a devastating war. The Arkard had intercepted humanity's Voyager 1 probe and had been studying human civilization ever since. With extinction looming, the Arkard broadcasted their message in every known language, hoping for salvation.

Though humanity could not intervene in their struggle, the signal was a stark reminder: they were not alone in the universe. The revelation of alien life sparked fear that contact with extraterrestrial civilizations could bring about humanity's destruction. In response, global leaders convened for a summit, resulting in the formation of the United Nations of Earth (UNE) and the largest operation in history: Operation One Earth, One Nation. By 2163, the UNE had unified Earth under one banner, crushing the remaining rebel factions in the process.

In 2186, humanity's mastery over negative mass led to the development of the first faster-than-light drive and wormhole generator. These breakthroughs enabled ships to travel instantaneously across vast distances. The first trial was the Humanity's Space Ship (HSS) Columbus, a vessel equipped with both technologies and crewed by 60 scientists, tasked with exploring the Alpha Centauri system as a potential new home for humanity. However, after six years of travel, the Columbus vanished, its crew lost when the ship emerged in the atmosphere of a planet—a devastating loss, but one that paved the way for future space exploration.

By 2250, humanity's first intergalactic war began when the Turian Hierarchy attacked Hessia, a newly established colony, believing humanity had violated galactic council laws. The ensuing conflict saw the UNE military, though inexperienced in space battles, outmaneuver the Turians with superior technology and tactics. After five years of brutal fighting, the Turian forces were pushed back, and the galactic council intervened to end the war.

By 2660, humanity had eradicated all known diseases, extending human lifespans to 600 years and perfecting gene modification to remove flaws from human biology. In 2852, the UNE had colonized thousands of worlds, creating monumental wonders like Dyson spheres, ring worlds, and deep-space habitats. Despite this, humanity's request for a seat in the galactic council was denied, as many council races feared humanity's unpredictable nature, believing they were too aggressive to be trusted. The council's fears were not unfounded, as the UNE's military might overshadowed all others, and any war with humanity would lead to near-total annihilation of the galaxy's civilizations.

In 2932, the Marikar Empire, feeling threatened by humanity's growing power, pushed the galactic council into a united war against the UNE. Rejected by the council, the Marikar declared Marixit, their secession from the council, and began a brutal war with humanity. The conflict lasted for 58 years, with the Marikar suffering overwhelming losses, their fleets and shipyards destroyed or captured. Faced with total defeat, the Marikar were forced to surrender, marking the end of humanity's second intergalactic war.

In 3001, a strange, ancient Roman-style structure appeared in the heart of New Ginza, a city on Eden Prime. From the shadow of the gate, an army emerged humans clad in ancient Roman armor, accompanied by a host of fantastical creatures. The Saderan Empire had arrived, and with it, a new chapter in humanity's intergalactic struggle began.