Zefram Cochrane was the man who developed the first Terran warp drive. Soon after he led the attack against the Vulcan invasion force that arrived in Bozeman, Montana on Earth on April 5, 2063. His actions prevented Terrans from becoming subordinate to the Vulcans instead of the other way around.
On that fateful day, the Vulcan ship T'Plana-Hath landed in Bozeman and its captain stepped out, giving Cochrane a devious hand symbol and deceptively stating "live long and prosper". A resident of Bozeman at the time, Cochrane "greeted" the Vulcan captain with a shotgun blast to the chest, and rallied the other Terrans in his midst to raid the Vulcan ship for their technology.