It really started with Queen Anne’s War (The War of Spanish Succession).
Hmmm, interesting. Looking at this, QAW effectively began the process of homogenizing British control of North America (driving out the French and Spanish from what would later become the U.S.) and settling out conflict with the Indian tribes, right? It was the beginning of the end, from what I can read here.
http://en.wikipedia.org/wiki/Queen_Anne%27s_War
http://www.usahistory.info/colonial-wars/Queen-Annes-War.html