Fighting in Vietnam started in 1954 when France tried to reassert their colonial claims to Indochina. Although it should be noted that this is not what led to the direct escalation of conflict--it was the communist influence.
The Declaration of Independence failed to change the status of Americans as rebels, and not soldiers of a recognized nation. If one looks into the distant future, the preamble failed to include blacks, Indians, women and others as equals.
The purpose of the Proclamation of 1763 was to prevent further white settlement on American Indian lands. This is still of importance to First Nations living in both Canada and the United States today. A line was drawn along the Appalachian Mountains where settlement was forbidden and this was essentially the line of demarcation between British Canada and the Colonies.
Causing the revolutionary war, therefore ending America’s neutrality