The term juramentado was coined by José Malcampo, in command during the Spanish occupation of Jolo Island in 1876, but Moros had been making such personal attacks for many years. By the time of the Spanish–American War juramentados were being discussed in the American media, some official sources finding few documented cases. By 1903, local United States Army commander Leonard Wood sent a report to Governor of the Philippines William Howard Taft indicating juramentados were "an oft repeated offense." Almost forty years later, on the eve of the Japanese invasion of the Philippine Islands beginning the Second World War, Time Magazine was reporting juramentado attacks in Jolo occurring "once every other day".