1965: The military action in Vietnam escalates with major U.S. bombing missions on North Vietnamese targets and a doubling of draft calls. This is a war that is looked on by many outsiders as an imperialistic action and based mostly on economic interests in the United States. Antiwar rallies attract crowds in major cities and on college campuses. Most of the antiwar support comes from the young.

Today: The Near East is the most potentially explosive section of the world, with Iraqi dictator Saddam Hussein regularly acting in a threatening manner and the United States trading threats sometimes accompanied by bombing missions. Although the Gulf War of the early 1990s sparked antiwar protest, there is little response to any aggressive military actions.

196S: Martin Luther King, Jr., and more than 700 civil rights demonstrators are arrested for protesting Alabama state regulations for voter registration in...