In 1970 , President Nixon scheduled an appearance at the national American Legion convention in Portland , Oregon , in order to promote the continuation of the Vietnam War . A coalition of Portland-based anti-Vietnam War groups , called the People 's Army Jamboree , planned a series of demonstrations and other anti-war activities , to be held at the same time as the convention . Law enforcement at all levels , expecting massive numbers of protesters on both sides , were concerned about large-scale violence &mdash; an FBI report estimated a potential crowd of 25,000 Legionnaires and 50,000 anti-war protestors , and suggested that the result could be worse than the protests at the 1968 Democratic National Convention in Chicago
1968 Democratic National Convention
1968 Democratic National Convention
Vortex I