Battle of Thranduil's Halls

The first battle of TETAT's first war, the Battle of Thranduil's halls was decided when Legolas' careful archery knocked Sauron and his supporters off the bridge into the halls, after which they were mopped up by Edrahil and Elrohir's forces.

Prelude
As they marched south through Rhovanion, Khamûl and Sathk's Dol Guldur and Easterling forces met a host of Mordor, commanded by Sauron himself. Convinced by their Dark Lord, they marched north to Thranduil's halls, catching the retreating elves off guard. Yet at the time, Elrohir had been marching east to Erebor, having heard of the previous battle of Erebor, and Edrahil was already present in the halls as an esteemed guest.

Battle
Initially taking the elves by surprise, the Dark Lord's forces quickly pushed through Legolas' hastily organized defenses, his archers in hiding slaughtered as he covered for Thranduil to get back into the halls. The tables turned when Legolas made it to the other side of the bridge, and with three careful shots knocked Sauron, Khamûl, and Sathk into the rushing river below. Thranduil and Legolas then took their troops onto the bridge, devastating Sauron's troops with their archers while Edrahil jumped into the fray, killing the Easterling Warlord Sathk. Before Sauron and Khamûl could climb onto the shore and charge again, they were met by Elrohir's timely cavalry charge, which pushed them back into the river to be struck down by Edrahil.

Aftermath
Sauron and Khamûl's attack enraged the Elves, whom quickly formed battle plans and marched south behind the two. Evil's defeat, while unlikely, poses an interesting "what if?" Thranduil's Halls had fallen at such a crucial point. The death of Sathk also paved the way for the rise of Cyrûs, a rival Easterling Warlord who would later become Emperor of Rhûdel.