In the summer of 1969 the situation worsened significantly in the Kazakhstan sector of the Soviet-Chinese border, defended by the Uch-Aral border guard detachment (near Dzhungar Gates area). On August 12, border guards at observation posts of the "Rodnikovaya" and "Zhalanashkol" outposts (BOPs) spotted movement of individual groups of PLA soldiers on the Chinese side of the border. General-Lieutenant Merkulov, the Chief of the Eastern border guard district, suggested the Chinese side to have a meeting to discuss the situation, but there was no answer.
On August 13 night, using favorable terrain, the Chinese covertly concentrated a group of up to 30 soldiers on their territory near the border opposite ht. "Kamennaya". Two more groups of 30 people each were stationed on the flanks of the disputed area: one - opposite 39th, and the other - opposite 40th border marks, and the reserve group of up to 60 people - at the BOP "Terekty".
- Two operations for the USSR border guard and the People's Liberation Army depicting a most realistic version of events.
- One operation for the PLA showing the Chinese version of events.
- Precisely recreated area near Zhalanashkol lake on the Soviet-Chinese border, 36 sq.km wide.
- Historical organizational structure of units at the time of the incident.
