frontier units operating on the island were equipped with BTR-60PBs, while the 57th border detachment group was equipped with BTR-50Ps and BTR-50PKs. The BTR-60 proved to be a worthwhile vehicle, although it sustained high losses due to the large number of RPGs used by the Chinese and mistakes made by the commanders of the APCs stemming from their insufficient combat experience with the new vehicles. The high losses due to RPG hits wasn't unexpected, as the BTR-60's armour was designed to protect the vehicle from small arms fire and shrapnel, but not specialized anti-tank weapons. The most effective tactic found for using BTR-60PBs was in covering the dismounted infantry. This is a job more suited for infantry fighting vehicles than armoured personnel carriers, whose main role is transporting infantry to the battlefield and providing them with armour protection during that time. The BMP-1, the world's first mass-produced infantry fighting vehicle, started production in 1966 and therefore the Soviet Army had very small numbers of those vehicles available at the time of Sino-Soviet border conflict. During the fights in March, the Chinese managed to capture four BTR-60PBs and one T-62 MBT. BTR-60PBs were used again during the border conflict east of Lake Zhalanashkol in Kazakhstan (Kazakh SSR at the time) in August 1969. During the fighting, the armour of BTR-60PB proved inadequate. Soviet–Afghan War The BTR-60PB was used in large numbers during the initial part of the Soviet–Afghan War. This was because the units that were originally used for this operation weren't the top priority of the Soviet military, which prioritized the units stationed in East Germany. The same design flaws were present during this conflict and the vehicle became even more vulnerable due to the kind of fighting that took place in Afghanistan. The GAZ-40P gasoline engines experienced frequent power losses and overheating due to the tropical highland climate for which they were not well suited. Also, the BTR-60PB's turret could not elevate its armament high enough to fire at the Mujahideen attacking from high ground. Like during the Sino-Soviet border conflict, many BTR-60PBs fell victim to RPGs. Because of those drawbacks, the BTR-60PBs were replaced by BTR-70s as soon as possible to a point where only the BTR-60 command variants were used. Other operational use Soviet BTR-60s, BTR-70s and BTR-80s were used for dispersing the demonstrations in Tbilisi in 1989 and stopping the fighting on the border between Uzbek