Battle of Ostagar

The Battle of Ostagar, that occurred in 9:30 Dragon, was a major engagement during the Fifth Blight between the kingdom of Ferelden and the darkspawn horde. This battle was the catalyst for the Ferelden Civil War.

The Conflict

Prelude

When the darkspawn appeared en masse in the northern Korcari Wilds, King Cailan Theirin formed his army and marched south to Ostagar along with his friend and advisor, Teyrn Loghain Mac Tir, hoping to end the advancce of the horde before they could penetrate Ferelden's heartland. Ostagar was chosen for its excellent strategic position; the old fortress had been built by the Tevinter Imperium in ages past to shield against a Chasind invasion, and while old, the fortifications would serve the king's army well. Such was the haste of Cailan's march that many of his vassals were still gathering their troops by the time he arrived, including the Amaranthine forces led by Arl Rendon Howe, and Redcliffe forces commanded by his uncle, Arl Eamon Guerrin.
That being said, Cailan's force was still sizable, and included numerous mages from the Ferelden Circle of Magi and the entirety of Ferelden's Grey Wardens. The latter had sensed the presence of an archdemon leading the horde, and had gathered all of their strength in hopes of bringing the creature down and ending the Blight in its infancy, even sending word to their comrades in Orlais to rally their forces. Before following the army, the Warden-Commander of Ferelden, Duncan, set off in search of new recruits to bolster the Wardens' numbers. One of the candidates he found was Kallian Tabris.

Deployment

By the time Duncan arrived at Ostagar with Kallian in tow, the army of Ferelden had already won three major battles, and there had been several small skirmishes in the Wilds, with the Ferelden army losing several patrols. 
Disturbingly, the darkspawn horde only seemed to be getting bigger. Even so, Cailan remained confident of victory, and without the visible presence of an archdemon unifying the horde, many had begun to believe that what they were facing was just a large darkspawn incursion, rather than a true Blight, though the Grey Wardens knew better.

Battlefield

Teryn Loghain cautioned King Cailan of the dangers of this campaign, but King Cailan countered that if that was so, then perhaps they should await the arrival of reinforcements from Orlais, to which Loghain vehemently objected. As a compromise, they decided to prepare for battle with what forces they currently had on hand. 
Along with his advisors, Teyrn Loghain devised a plan to destroy the darkspawn horde in one single decisive battle. The plan was to entice the horde into a hammer and anvil formation, charging ahead into a tight engagement where afterwards the rest of the Ferelden army would close the trap by attacking from behind. The Ferelden battle plan was divided into two parts: the lure, and the ambush attack. 
The idea was to present a target for the darrkspawn enticing enough for them to commit into an all-out attack. Thus by requirement, the army serving as the bait had to be relatively small, and look to be cornered. Anticipating tight quarters combat, the army serving as bait was comprised of Ferelden's best troops, led by King GCailan himself, the king's honor guard, and all but two of the Ferelden Grey Wardens, who were also to deal with the archdemon if the beast made its presence known. 
Once the darkspawn were fully engaged in the attack, a signal would be sent from the Tower of Ishal, upon which Teyrn Loghain and his troops - the bulk of the Ferelden force - would spring the ambush, coming out of hiding behind the horde and attacking, trapping the darkspawn between the two forces and destroying them. The lighting of the signal was assigned to the two newest Grey Wardens, the future king Alistair Theirin and Kallian Tabris.
It was hoped that the narrowness of the valley that led to Ostagar would effectively keep the darkspawn hemmed in and unable to bring their full strength to bear against the defenders, enabling the Ferelden army to destroy the horde despite its numbers.

The Engagement

Cailan and his troops waited by their defenses as the horde came out of the Korcari Wilds and, upon finding a small and cornered Ferelden force, mounted the attack. The darkspawn began their charge in earnest, while the Ferelden army waited for them to come closer, further luring them in as planned. Once close enough, Cailan ordered his arches and ballistas to fire a volley to blunt the darkspawn's incoming charge, cutting down many of the creatures.  Next, mabari hounds were unleashed to check the darkspawn attack, inflicting further casualties. And in that momentary confusion among the darkspawn ranks, Cailan ordered his own counter-charge, seizing temporary advantage in the close-quarters battle. A vicious melee between the defenders of Ostagar and the darkspawn forces then ensued.
Inside Ostagar, the two Grey Wardens assigned to lighting the beacon atop the Tower of Ishal made their way to their objective and discovered that the tower had been captured by darkspawn, having infiltrated it through underground tunnels. Linking up with a group of soldiers and a Circle mage, the Grey Wardens fought their way to the top of the tower and lit the beacon.
However, upon seeing the signal, Loghain instructed Ser Cauthrien to order his troops to quit the field instead of springing the ambush attack as per the battle plan, abandoning Cailan, his army, and the Wardens to their deaths. With Loghain's retreat, and the cornered and now-exhausted Ferelden army against the still overwhelming numbers of the darkspawn horde, the battle swiftly turned into a massacre.
Cailan himself fell to an ogre, who grabbed him and crushed him to death. Enraged by the king's demise, Duncan charged the ogre and killed it single-handedly, avenging the fallen king. With all hope lost, Duncan watched as the last remnants of the king's army were slaughtered by the darkspawn, and stayed next to Cailan's body until he too was slain by a hurlock alpha as the full might of the horde made its final assault. 
With the death of the king, and as Loghain's retreat became clear, what remained of the army attempted to rout, a mere fraction surviving as the darkspawn concerned themselves with either feasting on the dead or finishing off the wounded.

Outcome

As a result of Cailan's death, the country descended into chaos. The loss of the king and so many of his army left Ferelden increasingly undefended, and the darkspawn were able to push northward into the nation's heartland, unopposed by any force of significant size. Ferelden soldiers were still active in attempting to protect the roads from darkspawn, but could do little against the main horde. As a result, many thousands would die, and much of the country would be ravaged by the Blight until an army could be assembled to confront it. 
Cailan's death and the advance of the horde also caused a civil breakdown in Ferelden, as banditry and brigandage became commonplace with gangs of highwaymen taking advantage of the chaos to prey upon refugees, trade caravans, and undefended townships. This situation was not helped by darkspawn warbands advancing ahead of the horde, spreading terror and disrupting the nation's supply lines and attempts at defense. 
Meanwhile, Teyrn Loghain returned to Denerim and denounced the Grey Wardens as traitors after pronouncing himself regent to Queen Anora Theirin. The border with Orlais was sealed, preventing the arrival of the Orlesian Grey Warden reinforcements, and Loghain appointed the treacherous Arl Rendon Howe as his second-in-command, leading to numerous atrocities as he sought to stabilize his control over Ferelden. Immediately, Loghain faced opposition from Bann Teagan Guerrin and the independent freeholders of the Bannorn, many of whom were skeptical about his version of events regarding Ostagar, or felt he was opportunistically grabbing a throne he had no claim to so soon after Cailan's death, setting into motion a civil war between the freeholders and Loghain's loyalists. The recovery of Arl Eamon from his strange illness further worsened the situation, as it gave rise to two distinct political factions that fought for control over the throne.

Aftermath

The most lingering loss of Ostagar was that of Ferelden's Grey Wardens, all of whom had been slain along with the king, thus depriving the nation of its most valuable allies against the darkspawn when they needed them most. Only two survived; Alistair and Kallian Tabris. Their survival ultimately spelled the downfall of both Loghain and the Blight, as the two were able to rally an army to Ferelden's cause and defeat the former hero in the Landsmeet, thus uniting Ferelden in time to confront the archdemon at the Battle of Denerim.
It would be seven years after Ostagar before the casualties of the battle could be sorted, causing many survivors who fled to the Free Marches to be considered officially dead. Ferelden offered to reinstate the commissions of any surviving officers in the years following the Blight.

Historical Significance

Legacy

Perhaps the most surprising consequence of the battle would not be felt until some ten years later. Following Ferelden's defeat at Ostagar, the nearby village of Lothering was swiftly overrun by the darkspawn. The Hawke Twins fled the fall of Lothering with their family, arriving in Kirkwall and rising to prominence within the city.

Start Date

9:30 Dragon

Ending Date

9:30 Dragon