The United States was first introduced to the vexations of large-scale guerrilla warfare forty years ago in the mountain jungles of Nicaragua. There for the first time Americans were confronted by an elusive partisan leader of a type to become bitterly familiar not only in the Caribbean but in Southeast Asia, a man who pioneered techniques of warfare when Che Guevara and Fidel Castro were in rompers and Mao Tse-tung was an obscure revolutionary. “Mr. Coolidge’s War,” the affair has been called. More formally, it was the American intervention in Nicaragua of 1927-28—and though it was not one of the thunderclaps of history, its significance is evident.
For well over a year a particularly agile and mischievous guerrilla chieftain named Sandino—the name became almost a household word in the late twenties—campaigned successfully against the elite battalions of the United States Marine Corps. In giving them so much trouble, he unintentionally made his country a proving ground for U.S. weapons and tactics. In Nicaragua the Marine Corps began to formulate the doctrine that would guide the jungle campaigns against the Japanese in World War II and against the Viet Cong in South Vietnam; it tried out such novelties as dive-bombing, aerial support of ground forces, search-and-destroy missions, and the counterambush. It would not be appropriate to belabor the point, but with a change of dateline many of the dispatches from Vietnamese battlefields read like the afteraction reports of the Marines’ provisional brigade in Nicaragua.