The Systems Alliance is the representative body of Earth and all human colonies in Citadel space. Backed by Earth's most powerful nations, the Alliance has become humanity's military, exploratory, and economic spearhead. While the Alliance is relatively new to the galactic community, it has already made a name for itself, gaining humans an embassy on the Presidium. The Alliance is governed by a parliament based at Arcturus Station, which also serves as the Alliance's capital.
In 2148, a mining team on Mars made perhaps humanity's greatest discovery. After investigating the "Bermuda Triangle-like" reputation of the southern pole, the team unearthed the subterranean ruins of an ancient alien research station, revealing incontrovertible proof of the existence of alien life. Humanity was no longer alone in the universe.
The impact was profound in all areas of human culture, but nowhere more so than religion. New beliefs sprang up overnight such as the Interventionary Evolutionists, who zealously proclaimed the discovery as proof that all human history had been directed and controlled by alien forces. Even established religions struggled to explain extraterrestrial life. Some tried to incorporate this new-found knowledge into their dogma, some remained silent, while a few tried to stubbornly deny the evidence found on Mars.
The news of the discovery dominated the media and raised questions not only about the existence and purpose of humanity, but questions about the aliens themselves. Foremost, were they still out there? While these questions had served to fracture most religions, they had a unifying effect in politics. Rather than nations fighting each other over their differences, it was now "us vs. them" and the foundations of a united human front were laid.
Within a year of the discovery, Earth's eighteen largest nations had drafted and ratified the Systems Alliance charter, establishing a representative political body to expand and defend human territory. Shortly thereafter, the various nations of Earth pooled their military resources to create the Systems Alliance Military. The same year, 2149, the Alliance discovered the Sol system's mass relay orbiting Pluto, previously thought to be a moon, Charon. The Charon Relay propelled them into space, and the reach of humanity grew quickly.
The Alliance began a rapid campaign of expansion, establishing numerous colonies and constructing a large fleet, even though it had yet to encounter another species. Maintaining this expansion policy, the Alliance activated all the mass relays it could find to seek out new resources and possible colonies. But despite this success, the Systems Alliance was not considered a serious political body, as it was considered to lack the authority of individual nations.
Eight years later, humanity made first contact with another alien species, and everything changed. A scout fleet consisting of three frigates and two cargo vessels, trying to activate a mass relay, encountered a turian patrol fleet. Activating a dormant mass relay without knowing where it led had been declared illegal by the Council, though the humans did not know this. Only one of the human ships made it back to Shanxi colony, which was subsequently discovered by the turians and invaded. While individual governments remained unsure on what action should be taken, the Alliance took control and attacked the turians.
The resulting First Contact War was relatively short and bloodless, lasting only 3 months and costing 623 human lives (with a slightly higher number of turian casualties). The Citadel Council intervened and negotiated a peace. With the discovery of the Citadel and the greater community, humanity leapt onto the galactic stage. The Alliance received a surge of popularity, which gave it the necessary political credibility to establish its own Parliament and speak for humanity as a whole.
Since then, the Alliance has continued its expansion, with the resource wealth of a dozen settled colonies and hundreds of industrial outposts flowing back to Earth. This expansion brought the Alliance into conflict with the batarians as both species rushed to settle the Skyllian Verge, while maintaining a careful truce with the turians. The Alliance has also been granted an embassy on the Citadel. It has been speculated, given humanity's remarkably fast rise in terms of military, political, and economic power, that the Systems Alliance may soon be invited to join the Citadel Council. This has been a source of some concern to several other species.
Humans have expanded rapidly from Earth in a very short period of time, becoming swiftly integrated into Citadel society and the galactic economy. They have become less ethnically diverse in the twenty-second century, due to a more multicultural society and greater unity between nations. Improved medical advances and gene therapy have led to longer, healthier lifespans; the average citizen can now expect to live to around 150. Most humans retain their native tongue but learn alien languages or trade pidgin for the sake of convenience or as a gesture of unity.
One of the lasting consequences of the First Contact War was the interruption of a period of relative peace in the galaxy. Fairly or unfairly, humans are often thought of as aggressors and are sometimes portrayed as a disruptive influence by non-human media. At the same time, other races recognize humans as an adaptable, intelligent and militarily capable race.
The Alliance military is respected by the Citadel races for its novel tactics and technology. Their strength lies in fire support, flexibility, and speed. The Council regards the Alliance as a "sleeping giant" as only 3% of humans volunteer for military service. They make up for low numbers with sophisticated technical support in the form of VIs, drones, artillery, and electronic warfare, and emphasis on mobility and individual initiative. Their military doctrine is not based on absorbing and dishing out heavy shocks like the turians and krogan. Rather, they bypass enemy strong points and launch deep into their rear, cutting supply lines and logistics, destroying headquarters and support units, leaving enemies to "wither on the vine".
On defense, the Alliance military lives by Frederik the Great's maxim, "He who tries to defend everything defends nothing." Only token garrisons are placed on their colonies. These are intended for scouting rather than combat, avoiding engagement to observe and report on invaders using drones. However, the Alliance stations powerful fleets at mass relay nexuses so that in the event of an attack they respond with overwhelming force.
The Hahne-Kedar company and Aldrin Labs are key suppliers of the military. All soldiers receive gene therapy for improved strength and stamina. The Alliance also recruits biotics, who are trained using techniques developed at BAaT. The new L3 biotic implants are considered a significant step forward in biotic amplification.
At the time of the First Contact War in 2157 CE, six years after the beginning of the construction of humanity's fleet, the Alliance possessed a navy consisting of over 200 vessels ranging from small destroyers to imposing kilometer-long dreadnoughts and carriers. By 2183 CE, it is recognized as one of the greater military forces in Citadel space. As a signatory of the Treaty of Farixen, the Alliance is restricted to building and maintaining a smaller number of dreadnoughts compared to the turians. The Alliance Navy has made up for this with the innovative design and deployment of carriers, which are as large as dreadnoughts, but are not constrained by the treaty because their primary armament consists of fighters instead of ship-length mass accelerator cannons. The Alliance Navy is headquartered at Arcturus Station in the strategically invaluable system of Arcturus, which contains several primary mass relays that link to major human colonies, and the secondary mass relay that leads to Sol and the human homeworld of Earth.
The Alliance Navy is the branch of the Systems Alliance military responsible for naval operations. The Alliance Marines, the ground operations branch of the Alliance military, are a specialized branch of the Navy.
The Alliance Navy is one of the greater naval forces in Citadel space. It is known to number at least several thousand ships.[1] Its military prowess has drawn the attention of the Citadel Council. While the Council is concerned about the possible outcome of another war between humans and turians, they are also keen to harness the Alliance Navy's peacekeeping potential, especially in unstable regions like the Skyllian Verge and the Attican Traverse. The Navy also makes humans an attractive prospect as the newest Council species.
The Alliance Navy possessed over 200 vessels as of the First Contact War in 2157 CE, including several dreadnoughts, and was divided into at least two fleets. By 2186 CE and the onset of the Reaper War, it possessed nine dreadnoughts and was divided into at least eight fleets. Alliance fleets are subdivided into numerous flotillas, each of which include a cruiser and 4-6 frigates. Its individual vessels range considerably in size and firepower, varying from hundred-meter-long frigates to nearly kilometer-long dreadnoughts. Fleet units are also supported by fighters and dedicated interceptors deployed from cruisers, dreadnoughts, and carriers. Fighter carriers, dreadnought-sized ships that contain extensive hangars and employ fighters as their main armament, are a distinctly human innovation.