In the comics, the heroes first fought Thanos and Nebula (Infinity Gauntlet mini series), then The Magus and his Dopplegangers (Infinity War mini series).
American Civil War | Vietnam War | American Revolutionary War | Cold War | Iraq War | War of 1812 | Spanish Civil War | Korean War | Allies of World War II | English Civil War | Gulf War | Franco-Prussian War | Pacific War | war | Second Boer War | Peninsular War | United States Department of War | Second Sino-Japanese War | Crimean War | Thirty Years' War | Spanish-American War | Trojan War | Union (American Civil War) | French and Indian War | War Office | Falklands War | Seven Years' War | First Balkan War | Hundred Years' War | War Department |