Lady Arannelya

Lady Arenneyla was a Aldmeri commander during The Great War and the main force of the Thalmor (Skyrim) invasion into Hammerfell.

Start of the War
Shortly after Lord Naarifin's attack on southern Cyrodiil Lady Aranneyla's troop's made their move into Hammerfell firstly bypassing the West Colovian and the cities of Kvatch and Bravil eventually moving into Hammerfell starting the attack.

Assault on Hammerfell and The March of Thrist
Just after entering Hammerfell Lady Aranneyla's troops attacked the southern coastline of Hammerfell. With the civial war going on in Hammerfell the few scattered legion's there provided little defense and where eventually driven into the nothern sand's of The Alik'r Desert, this event was ( from there on ) known as The March of Thrist.

Content to have full power over their gain's in Hammerfell The Thalmor there ( Lady Aranneyla's troops ) continued to secure the major cities their as their main and actual objective was the invasion of Hammerfell they started to annex cities on the southern coastline all gave in apart of Hegathe.

However in the north the survivor's of The March of Thrist including General Decianus, regrouped with reinforcements from High Rock. Lady Aranneyla's advance's into the Alik'r where successful however they clashed with General Decianus in Skaven and a bloody conflict went on for hour's in the end and eventually Lady Aranneyla's troops won however they where not able to continue their assault through Hammerfell.

After a few days the Aldmeri troop's where doomed and where eventually driven back from skaven Lady Aranneyla's power was crushed as she withdrawed and the last of The Thalmor withdrew from Hammerfell.

Trivia

 * Lady Aranneyla was in fact able to take a significant area in Hammerfell in she'd know that General Decianus's troops had left for Cyrodiil.