First Battle of Hoover Dam

The  is the colloquial name applied to the first offensive mounted by Caesar's Legion against New California Republic forces entrenched on the Hoover Dam structure, in 2277.

Annexation of the Dam
Prior to the establishment of the NCR military in the Mojave region, NCR scouts had reported that the Hoover Dam was more-or-less completely intact, and completely capable of producing more than enough power for the whole of NCR. As the soldiers began to pour in, Mr. House was able to secure the New Vegas treaty and prevent hostilities between (most) of the tribes in the region and the NCR.

Across the River
While NCR was being formed West of the Colorado River, Caesar's Legion was forming to the East. Led by Caesar and his Legate, Joshua Graham, the Legion had also been preparing to take the great Dam for themselves. Conflict would ensue.

First Battle
Finally, in 2277, Legion forces began to swarm across the Dam. New Californian soldiers and Rangers stationed on the Dam itself were over-run within hours. However, as Caesar's highest-ranking Centurions and soldiers pushed into the booby-trapped Boulder City, the entire town exploded. Ranger sharpshooters and snipers in NCR's 1st Recon detachment picked off survivors, and the Legion retreated back to Fortification Hill.

Aftermath and Second Battle
Following the battle, NCR soldiers have retaken the Dam and are making preparations for the inevitable Legion counter-attack. A memorial to the 100 soldiers and Rangers lost in the battle was erected outside of the ruins of Boulder City, and Joshua Graham was forcibly cast into the Grand Canyon for his incompetence in the battle.

The events of Fallout: New Vegas begin in 2281, four years after the battle, and at the start of the second offensive made by the Legion.

Appearances
The is only mentioned in Fallout: New Vegas.