Hi Andrew - thank you for your comment. My intention is to show the commonality of the situations where the US was reluctant and slow to intervene (thus the title “a brief history”). The common factors are a planned annexation (not occupation) of land and/or resources and the attempted genocide or purging of a group or groups. In the case of WWI, WWII, Rwanda, and now the Ukraine, the US had / has a chance to do more, sooner and we know how those historial situations turned out. Perhaps I could have included the first Gulf War where we did act quickly and with overwhelming force but then we stopped short of removing an evil dictator. When you bring up the Global War on Terrorism, it is apples and oranges compared to what I covered. In those situations, coalitions of democratic and free nations sought to remove autocratic state supporters of terrorism and dismantle the groups that would carry out their bidding by capturing or killing key leaders and seizing their assets.