Weapons supplies were made available through numerous countries. The United States purchased all of Israel's captured Soviet weapons clandestinely, and then funnelled the weapons to the Mujahideen, while Egypt upgraded its army's weapons and sent the older weapons to the militants. Turkey sold their World War II stockpiles to the warlords, and the British and Swiss provided Blowpipe missiles and Oerlikon anti-aircraft guns respectively, after they were found to be poor models for their own forces. China provided the most relevant weapons, likely due to their own experience with guerrilla warfare, and kept meticulous record of all the shipments.