In Guinea, the success of PAIGC guerrilla operations put Portuguese armed forces on the defensive, forcing them to limit their response to defending territories and cities already held. Unlike Portugal's other African territories, successful small-unit Portuguese counterinsurgency tactics were slow to evolve in Guinea. Defensive operations, where soldiers were dispersed in small numbers to guard critical buildings, farms, or infrastructure were particularly devastating to the regular Portuguese infantry, who became vulnerable to guerrilla attacks outside of populated areas by the forces of the PAIGC. They were also demoralized by the steady growth of PAIGC liberation sympathizers and recruits among the rural population. In a relatively short time, the PAIGC had succeeded in reducing Portuguese military and administrative control of the territory to a relatively small area of Guinea. The scale of this success can be seen in the fact that native Guineans in the 'liberated territories' ceased payment of debts to Portuguese landowners and the payment of taxes to the colonial administration. The branch stores of the "Companhia União Fabril" (CUF), "Mario Lima Whanon", and "Manuel Pinto Brandão" companies were seized and inventoried by the PAIGC in the areas they controlled, while the use of Portuguese currency in the areas under guerrilla control was banned. In order to maintain the economy in the liberated territories, the PAIGC established its own administrative and governmental bureaucracy at an early stage, which organized agricultural production, educated PAIGC farmworkers on how to protect crops from destruction from aerial attack by the Portuguese Air Force, and opened "armazens do povo" (people's stores) to supply urgently needed tools and supplies in exchange for agricultural produce.