United Nations International Defense and Expeditionary Force

The United Nations International Defense and Expeditionary Force (UNIDEF for short) is an international organisation containing every UN member nation. It's goal is allow strategic cooperation between nations in case of an invasion of Earth or it's territories. UNIDEF is enforced by the UN council and the UN master computer with the help of integrated chips in every piece of military hardware.

Differences between UN peacekeepers and UNIDEF
UN peacekeepers are mainly deployed to humanitarian crises such as the Congo and Rwanda. UNIDEF soldiers on the other hand are all of earth's militaries combining into a single force to defend the plant or humanity's territories.

UNIDEF equipment is also more up to date than Peacekeeper equipment due to most UNIDEF members being first or second world nation. Along with this in need to keep competitive with alien forces UNIDEF members are usually some of the best humanity can offer.

Equipment
Equipment of UNIDEF is unstandardized, due to it's calibers being determined on country by country basis. The only standardized piece of gear are patches to signify organisation and country of origin along with a turquoise helmet.

UNIDEF's most notable operation is running Earth's orbital defenses. Along with this over 50% of humanity's star fleet is controlled by them.

Second Xenoceph war (1969-1972)
Probably the first notable engagement of UNIDEF was the second xenoceph war. UNIDEF forces quickly depleted the Xenoceph's invasion fleet through the use of manually detonated ICBMS. Despite the flaws in ground force organization, UNIDEF forces allowed rapid response times to any xenoceph landing site in the world.

Colonial Wars (1973-present)
During the second age of exploration, UNIDEF forces were responsible for enforcing land claims, along with patrolling common trade routes.

Invasion of Avalon (1995)
After the Avali's failed raid on Earth, almost all members signed off on an invasion of the moon of Avalon. This mission consisting of over 100 human warships invaded the Avalon system and crippled the Avali Illuminates' military into surrendering and forcing them to become a trade partner.

Operation Corridor and Tal (1997-2004)
After the failed diplomacy with the Kingdom of Shigu and discussions with the Confederation of Reono a UNIDEF task force was deployed to Tal in hopes of toppling the Shigu government. After about half a year of fighting, UNIDEF forces stormed Shigu's capital and liberated all land taken by them. After this Tal was considered a protectorate of the United States with help mainly from the Soviet Union.

UNIDEF members remained on the planet along with UN peacekeepers to help maintain order and guard rebuilding and terraforming efforts. Despite this both UN factions were ordered to remain inactive unless in self defense during the Tal border wars.

Peacekeeping for the Commonwealth of Civilized worlds (2004-present)
After joining the Commonwealth of Civilized worlds humanity contributed massively to assisting the Commonwealth with anti piracy and counter terrorism operations in hopes of building trust and gaining access to new alien technologies.

Protogen Wars (2041-2044)
The largest war ever in human history was UNIDEF nearly perfected. After the invasion of France UNIDEF gathered at the foot of the Pyrenees. This resulted in Humanity's first strategic victory against the protogens. After the Suez campaign, UNIDEF focused its efforts into invading northwestern europe. Shortly into 2043 a fleet of over 1,000 ships landed on the coastline of europe. shortly after a costly pincer maneuver, UNIDEF forces divided the Protogen lines in half, and only a few months later their main production facility in the ural mountains was destroyed.