Unity City (city)
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Located near the newly pristine Puget Sound of the North American continent of Terra, construction of Court of the Star League and its surrounding city was initiated in the years prior the formal signing of the Star League Accords. As befitting the center of Humanity, the city was huge, elaborate and awe-inspiring, incorporating materials from all the Member States in its construction. Once built the Court of the Star League was hailed as an architectural marvel, with one visiting architect calling it "a fairy-tale place, where parking garages as as beautiful as the Taj Mahal.
It was also the location of the Royal Court, which met for two months during the spring and winter Council meetings. Somewhere near the city was located a military base named Fort Cameron, the base of the bodyguard unit of the First Lord, the Royal Black Watch Regiment. The 27 of December 2766, the Amaris Coup put a end to that. Stephan Amaris murdered Richard Cameron, the last First Lord of the League, in the Audience Chamber, and the city and his environs become a battle field between the Amaris forces and the Star League defenders. The hardest battle was fought beside the city: after an atomic strike launched from Amaris' fighters destroyed Fort Cameron, effectively wiping out those elements of the Watch that were still mobilizing. Only survived two lances of Black Watch 'Mechs were able to escape the traps and confronted the 4th Dragoons at Gorst Flats, protected on one side by high forested hills and Puget Sound on the other, which forced the Dragoons to confront them individually. Both efforts, however, were ultimately doomed. After losing ten 'Mechs to the entrenched Black Watch soldiers, all of whom had been graduates of the infamous Gunslinger Program, the Dragoon's commander withdrew his forces and wiped them out with a nuclear explosive. More than a third of the nearby Unity City went in flames as consequence of the blasts, and the Star League Court was charred black in some areas. But the worst consequence was the burning of all the forest in the nearby hills. Few days later, a torrential rain turned these hills into a massive series of mud slides over the city. More than half city was covered by the mud, burying buildings until wo stories. A swamp formed in the rest of the city. 
After Stefan Amaris murdered the rest of Cameron family in the Audience Chamber, he ordered the room sealed. No one opened them until Aleksandr Kerensky SLDF army liberated the Earth, 11 years later. When the Chamber was opened, the mortal remains of all the Cameron family were found there. After this discovery, Kerensky ordered the execution of Amaris and all his family.
After the High Council of the Star League disbanded, and the League was de facto dissolved, Jerome Blake, last ministry of the League, and head of all Hegemony reconstruction process, decided the efforts to restore the Court were a waste of resources, and ordered the work stopped and the Court sealed in spring of 2783. Unity City, still two centuries later, was the most visible wounds in Terra. ComStar keep Earth safe from the battles, but keep Unity City as it was, as the populace abandoned the area.  In 2901, however, the known as "mad Primus" of ComStar, Dwight Kurstin transferred the headquarters of ComStar to the Court of the Star League. He also reopened the sealed throne room and established himself there... and there was killed, on January 3 2092, by a mysterious ROM agent codenamed "Saber". Only some years before the Clan invasion the group worked to unearth some of the ruined city. After the Battle of Tukayyid new Primus Sharilar Mori planned to revitalize and rebuilt Unity City and restore the Court of the Star League, systematically stripped by the previous Primus along the centuries, but Operation ODYSSEUS probably put an end to that project 
- The Star League, p. 40 "History - Birth of the Star League - The New Order"
- Historical: Liberation of Terra Volume 1, p. 73, "Battle for Unity City", Schmitt leads a company to meet the advancing Fourth Amaris Dragoons
- ComStar sourcebook p. 10
- Historical Liberation of terra II p. 117
- ComStar sourcebook p. 10
- ComStar sourcebook p. 36
- ComStar sourcebook p. 87