Top US officials and lawmakers have hinted that military intervention in Venezuela is an option. It certainly wouldn't be the first time that Uncle Sam has sent troops south of the border. Since 1898, the US has effected, directly or indirectly, 41 changes of regime in more than a dozen Latin American countries, according to a Harvard study. That includes 17 instances of overt military or CIA action and 24 murkier interventions: here's a map of the meddling. Note: since you are about to ask, no the Bay of Pigs invasion is not counted, because it failed to overthrow the Castro regime.