From Dragon Age wiki
Loghain Mac Tir
Loghain Mac Tir is a complex military commander and key political figure in the kingdom of Ferelden who serves as a primary antagonist during the Fifth Blight.
Background
Loghain Mac Tir rose to prominence as the right-hand man of King Maric Theirin during the rebellion against the Orlesian Empire. A tactical genius and fierce patriot, he became the Teyrn of Gwaren and a central pillar of the Fereldan monarchy. His deep-seated hatred for Orlais defines much of his political ideology, often clouding his judgement when dealing with external threats.
The Fifth Blight
During the Battle of Ostagar, Loghain withdrew his forces, an act that led to the death of King Cailan Theirin and the near-destruction of the Grey Wardens. This betrayal forced Alistair Theirin and the player character to navigate a fractured nation while the darkspawn army grew in strength. His subsequent regency was marked by paranoia and civil unrest, as he prioritised his own vision for Ferelden over the necessity of uniting against the Blight.
Legacy
Depending on the choices made by the player, Loghain can meet his end at the Landsmeet or be recruited into the Grey Wardens to redeem his past actions. His life serves as a cautionary tale regarding the cost of nationalism and the difficulty of balancing personal conviction with the survival of the realm.