By mid-May, a majority of the OAS voted for Operation "Push Ahead", the reduction of United States forces and their replacement by an Inter-American Peace Force (IAPF). The Inter-American Peace Force was formally established on May 23. The following troops were sent by each country: Brazil – 1,130, Honduras – 250, Paraguay – 184, Nicaragua – 160, Costa Rica – 21 military police, and El Salvador – 3 staff officers. The first contingent to arrive was a rifle company from Honduras which was soon backed by detachments from Costa Rica, El Salvador, and Nicaragua. Brazil provided the largest unit, a reinforced infantry battalion. Brazilian General Hugo Panasco Alvim assumed command of the OAS ground forces, and on 26 May the U.S. forces began to withdraw.