The end of World War I saw Congress authorize 1,020 men for Marine Corps aviation and the establishment of permanent air stations at Quantico, Parris Island and San Diego. The United States embraced its role of global power, and the Marine Corps became the preferred force for military intervention; where the Marines went, so went Marine Corps aviation. During the Banana Wars, while fighting bandits and insurgents in places like Haiti, the Dominican Republic and Nicaragua, Marine Corps aviators began to experiment with air-ground tactics and making the support of their fellow Marines on the ground their primary mission. It was in Haiti that Marines began to develop the tactic of dive bombing and in Nicaragua where they began to perfect it. While other nations and services had tried variations of this technique, Marine Corps pilots were the first to embrace it and make it part of their tactical doctrine. Marine Corps aviation in Nicaragua developed the skill of air resupply of outposts dropping bundles from Fokker F.VII tri-motors. Even prior to the events in the Caribbean, pioneering Marine Corps aviators such as Alfred Cunningham had noted in 1920 that, ""...the only excuse for aviation in any service is its usefulness in assisting the troops on the ground to successfully carry out their missions. ""