Star League (3151–)
- This article is about the third Star League. For other uses, see Star League (disambiguation).
|Time period:||3151 – Present|
|Military:||Star League Defense Force (SLDF)|
Fall of the Republic
During the fight on Terra, Devlin Stone and his Republic forces were suffering the brunt of the fighting between Clan Wolf and Clan Jade Falcon. This changed however when Exarch Damien Redburn enacted a plan to destroy both Clan leaderships under the guise of a false-flag operation. Although reluctant to approve the plan, Stone accepted it as the only means to end the war. Though the plan seemed sound, it backfired when Redburn killed the wrong target and in turn, was killed himself. Although Damien did not live to see it, his plan caused the downfall of the Republic as Stone would surrender to both Clan Wolf and Clan Jade Falcon to discuss further terms. The Exarch offered himself to the Khan as a bondsman to the Wolves, but an angered Alaric refused his offer. With few options left, Devlin Stone disbanded the Republic of the Sphere.
Trial for ilClanship and Afterwards
After the fall of the Republic, Khans Alaric and Malvina enacted one final trial to end their rivalry once and for all, the ilClan Trial. This trial was a "winner-take-all" challenge that would decide not only the fate of Terra but the entire Inner Sphere, too, as the winner would become First Lord of the Star League and ilKhan with the title of ilClan. Mirroring the Refusal War from long ago, both sides mauled each other until Clan Wolf was the victor. After the battle, Clan Wolf ruled Terra, with Clan Jade Falcon acting as the bodyguard for the ilKhan and Clan Smoke Jaguar bound to the ilClan. Of all the Council of Six Clans, only the Clan Hell's Horses refused to follow the IlClan, at least initially.
Later in the Star League's history the Blackout's impact upon the Inner Sphere faded, although this did not occur until some years after "the Last Annihilation". The so-called Dark Age Era preceding the ilClan's rise was often derided in public retrospectively as a literal "dark age", even the peaceful and prosperous decades prior to the HPG collapse as noted by Loremaster Stephan Roshak.
Clan Snow Raven willingly joined the IlClan. In 3152, they easily conquered the Federated Suns world of Milligan. Their forces, with or without Alaric's permission, wore the Cameron Star of the Star League.
By 3250 the League had well-established arenas where warriors fought duels or historical reenactments. Some of these warriors used state-of-the-art BattleMechs, while others (usually novices or poorer MechWarriors) piloted older designs. Gunslinger Jázon Marik was a noted participant in these arenas.
Dissenting forces such as the Lost Command and "Renegades" had emerged as opponents to the League by 3250. Units known as Auditor Clusters were tasked with seeking out unauthorized industry and military manufacturing throughout both the League and the Periphery, in part to forestall these dissidents' efforts. 
The SLDF Regular Army was revived at some point and appeared to be a separate entity from the Clan toumans. Members of both sought to attain the coveted status of Gunslinger, which was modeled (with some changes) on the Republic's Knights and likewise offered role models for the public and other military personnel to aspire to.
- Though the third incarnation of the Star League, individuals in-universe have yet to refer to the "Third Star League". See this article's talk page for the details on the article's naming structure.
- Second Succession War, p. 11
- Technical Readout: Dark Age, p. 4
- Dominions Divided, p. 74
- Technical Readout: Succession Wars, p. 4
- Technical Readout: Jihad, p. 4
- Technical Readout: Clan Invasion, p. 4