Proclamation Act of 1763 The Proclamation Act of 1763 was a major change for both the English and the French. For the English, they wanted to assimilate the French. This was One, the British had, after all, conquered them, and wished to create a full British Empire. They thought that the only way to do this was to assimilate all other cultures (except the Natives) into their culture. Two, the French were still a threat, and Quebec was the foothold in the New World for France. The mother country, France, could send armies to New France and attack the British. The main purpose of the Proclamation Act was simple, assimil