Helm

Who is Helm:

Helm is the god of guardians, protection, and protectors. He was worshiped by guards and paladins both, long being seen as a cold and focused deity who impartially took the role of defender and sometimes also enforcer. His activities in the Time of Troubles caused the folk of Faerûn to look differently on the Watcher. During the Time of Troubles in 1358 DR, when the gods walked Toril, it was reliable Helm whom Lord Ao trusted with the task of keeping the other deities from returning to their divine realms in the planes without returning the stolen Tablets of Fate. For this task, Ao left Helm with all his divine abilities, guarding the Celestial Stairway to the planes.
On Midsummer, when the goddess Mystra who had spirited away a portion of her divine power in the realms, which she then recovered once the gods were cast from the heavens attempted to pass him without the Tablets, she was turned back by the Watcher, and when she forcibly tried to pass him, he destroyed her with a catastrophic explosion in the skies above Castle Kilgrave, north of Arabel. Following Mystra's death, Helm shed a single tear that fell to Toril, but stopped before hitting ground. Hovering over the crater of destruction left below, the teardrop appeared as a magnificent gemstone, filled with the torment and guilt that Helm felt inside.  This action had enormous repercussions for Helm. Whilst it put off any of the other earthbound deities attempting the same action, it also caused the other deities and mortals alike to hold Helm in great contempt. Surprisingly, however, Helm's following remained strong in the south.
After the Time of Troubles ended and other gods were restored to their former existences, Helm himself was no longer bound to stand guard against them and much of his worship had faltered. The reputation of his clergy was made worse when the natives of recently discovered Maztica, whom the priests of Helm were subjugating in their conquest of the region, highlighted their cause. However round about 30 years later he was killed by Tyr after being accused of stealing the heart of Tymora. After the second sundering her returned to the realms.

His position in the war:

Helms people took over his kingdom no less then a month after the initial uprising, though many weren't surprised. Even though his people never really lost faith in him after all this time, they most certainly aren't as loyal as they once where. Though many believe the people where nudged into the uprising by those who took over Lolth and Shar.