In 1937, Trujillo, in an event known as the "Masacre del Perejil" (Parsley Massacre), ordered the Army to kill Haitians living on the border. The Army killed about 10,000 to 15,000 Haitians over six days, from the night of 2 October 1937, to 8 October 1937. To avoid leaving evidence of the Army's involvement, the soldiers used machetes instead of bullets. The soldiers of Trujillo interrogated anyone with dark skin, using the shibboleth "parsley" to differentiate Haitians from Afro-Dominicans when necessary, the "r" of parsley was difficult pronunciation for Haitians. As a result of the slaughter, the Dominican Republic agreed pay to Haiti the amount of $750,000, later reduced to $525,000. The genocide sought to be justified on the pretext of fearing infiltration, but was actually also a retaliation, commented on both in national currencies, as well as having been informed by the Military Intelligence Service (the dreaded SIM), the government Haitian cooperating with a plan that sought to overthrow Dominican exiles.