New Vegas Help possible *SPOLIERS*

I am doing the yes man/wild card end quests and dont know how to get the brotherhood of steel to help at the battle for the dam. I have all of the others such as the boomers etc. I have done all of the brotherhood quests and got the power armor but it just says go and tell yes man you can ignore BoS. How do i get them to fight with me like the other factions??

You don't need them to help you. You can either do missions to help the Brotherhood with their underground bunker, kill them all and blow it up, or tell Yes Man you just want to ignore them. If you help them with their facility all you get is a key to a Brotherhood safehouse somewhere and the armor.

You don't need them to help you. You can either do missions to help the Brotherhood with their underground bunker, kill them all and blow it up, or tell Yes Man you just want to ignore them. If you help them with their facility all you get is a key to a Brotherhood safehouse somewhere and the armor.

Bigboi500

Pretty much this. The only other faction that might lend assistance to you at the dam is the Enclave.

I didnt even know the enclave were in the game. Where can you find them?

Go to the Old Mormon Fort in Freeside and convince Arcade Gannon of The Followers of the Apocalypse to become your companion. After you gain a certain amount of trust with him he'll reveal that he and his father were former members of the Enclave before their downfall and you go on a sidequest finding the Enclave remnants and meeting them at an old bunker and they'll fledge their support to you.