Second Battle of Hoover Dam The Second Battle of Hoover Dam is the second offensive mounted by Caesar ' s Legion against New California Republic forces entrenched on Hoover Dam , as well as in the Mojave Wasteland , taking place in the year 2281 . Prelude . After the First Battle of Hoover Dam , Robert House knew that as soon as either the NCR or the Legion became victorious at the Dam , they would turn their attention to New Vegas . In an attempt to stop this and allow the city to remain under his control , he had hire a courier to retrieve his platinum chip , a data storage device capable of upgrading the city ' s defense systems and activating a massive army of securitron s , which would give House the ability to single - handedly crush the Legion and intimidate the NCR into a retreat . However , the leader of the Chairmen , Benny , learned of this plan and ambushed House ' s Courier outside of Goodsprings , shooting the Courier in the head and leaving them for dead in a shallow grave and taking the platinum chip , throwing House ' s plans into disarray . The Courier survived , however , and began a journey to the New Vegas Strip to find Benny and exact revenge , in the process learning the true purpose of the platinum chip and its power . The Courier was faced with the choice of either giving the chip to House or destroying the securitron army , or even using it to create an army of their own . The Courier ' s journey attracted the attention of the NCR and the Legion , both wanting such an influential individual on their side . In preparation , the Courier traveled the land looking for tribes to ally with . Battle . Hoover Dam . The Courier ' s role in the battle depended greatly on which they sided with . If the Courier sided with House or Yes Man , the battle played out in a similar fashion , both involving the activation of the securitron army . From there , the Courier was forced to fight their way across the dam and into the Legion camp . The NCR questline had the Courier perform the same basic task : fighting through enemy forces to get to the Legion camp on the other side of the dam . While traversing the dam , any aid the Courier had enlisted would have been acted upon by the corresponding faction . Once the Courier reached the other side of the dam and entered the Legate ' s Camp , they would face off against Legate Lanius . The resulting confrontation would either have had the Courier fight and kill the Legate , or solve the confrontation diplomatically . After dealing with the Legate , the Courier returned to the main gate , at which point General Lee Oliver and his men destroyed it . If siding with the NCR , Oliver would have congratulated the Courier ; however , if siding with Yes Man or Mr . House , the Courier would have been forced to confront General Oliver , either fighting and killing Oliver and his men or solving the issue through diplomacy . If the Courier sided with the polar opposite , the Legion , the battle played out in a similar fashion to the battle involving the Courier siding with the NCR , only it would play out in reverse ; the Courier started at the Legate ' s camp , and then fought their way across the dam to reach the NCR ' s position , confronting General Oliver . Once again , the Courier was forced to choose between killing the General or convincing him to leave through diplomacy . Elsewhere . The details of the battle at Hoover Dam are unclear , however the fighting was not just limited to that relatively small location ; violence engulfed the entire Mojave Wasteland as Legion forces and its allies attacked NCR targets and locations across the region , with varying levels of success : Aftermath . Independent . < section begin = " Yes Man " / > " Narrated by Ron Perlman " < section end = " Yes Man " / > Mr . House . < section begin = " Mr House " / > " Narrated by Ron Perlman " < section end = " Mr House " / > Caesar ' s Legion . < section begin = " Caesar ' s Legion " / > " Narrated by Ron Perlman " < section end = " Caesar ' s Legion " / > New California Republic . < section begin = " NCR " / > " Narrated by Ron Perlman " < section end = " NCR " / > Appearances . The Second Battle of Hoover Dam occurs in " " .