You conveniently left out the late 1930s and 1940s, in which a nation-state perpetuated ethnic war and genocide before being stopped primarily by two fairly tra

You conveniently left out the late 1930s and 1940s, in which a nation-state perpetuated ethnic war and genocide before being stopped primarily by two fairly transnational states. Would you be interested in a summary of 20th century armed conflicts, classified by the type of states involved? There are a couple in Asia and Africa I'm thinking of.