In 1964, PAIGC held its Cassaca Congress, which decided on reforms to discourage militarism inside the organisation. Thereafter the war effort was carried out not by autonomous guerrilla groups, but by guerrilla units within a nationwide army, the Revolutionary Armed Forces of the People (Forças Armadas Revolucionárias do Povo, FARP). From then until the close of the war, the basic fighting unit in FARP was the highly flexible "double group" (bi-grupo), which comprised two distinct commandos of 15 to 25 men each, normally operating together but also capable of remaining operational if separated (or if joined with other double groups). Also from 1964, PAIGC implemented what Chabal calls a "dual command" at all levels of its military apparatus: at every level, leadership was exercised jointly by two men, one military commander and one political commissar.
