For the Peruvian military, the mobilization process was somewhat more problematic. The Cenepa valley area was devoid of any major roads, population centers, or helicopter bases on the Peruvian side. The Peruvian Army and the Peruvian Air Force (FAP), had to organize an air-bridge to get reinforcements to the zone. Troops, heavy weapons, ammunition and supplies had to be flown in first from the Peruvian hinterland and Lima to Bagua AFB, where they were transferred to light transport aircraft for the flight to the Ciro Alegría base. From this base, the final flight to the Peruvian forward bases in the Cenepa valley, mainly Observation Post 1 (PV-1), was made aboard Peru's Mil Mi-8 and Mil Mi-17 helicopter fleet, very often under poor weather conditions, with heavy rain and low cloud cover.