I don't think there are laws that defy the first amendment. However there may be signs asking you to be quiet or to be polite out of interest of certain people/things.
<span> how nationalism and imperialism contributed to the outbreak of ww1 for example, was won after costly wars against native tribes like the Zulus, then European imperialism in America, the United States also engaged in a degree German Weltpolitik and 'gunboat diplomacy' in both France and Britain.</span>
Angola's civil war happened at the time of the Cold War, when the US and Soviet Union fought a number of proxy wars. Angola's war was simialar to those and one of the sides was Marxist-Leninist, so the Soviet Union was bound to support it and the US oppose it.
Corona vaccine is the important one
