Battle of Lake Khasan

Battle of Lake Khasan
Part of the Soviet–Japanese border conflicts
Lieutenant I. N. Moshlyak and two Soviet soldiers on Zaozernaya Hill after the battle[1][2]
Date 29 July – 11 August 1938 Location Lake Khasan, Russian SFSR, Soviet Union (near Fangchuan, Manchukuo) Result Ceasefire[3] Territorial changes Soviets reoccupy Changkufeng after the Japanese withdrawal following a peaceful diplomatic settlement.[4] Soviet-Japanese border set at the Tumen River[5]
Belligerents
Soviet Union	Japan  Manchukuo
Commanders and leaders
Vasily Blyukher Nikolai Berzarin Grigory Shtern	Suetaka Kamezo Kotoku Sato
Units involved
Soviet Border Troops 59th Khasanskiy Detachment
Strength
22,950[6][7] 354 tanks 13 self-propelled guns 237 artillery pieces 70 fighters 180 bombers[8]	7,000–7,300[9][7] 37 artillery pieces[8]
Casualties and losses
792 killed & missing 3,279 wounded or sick[10] (~1.400 wounded in combat) 46+ tanks destroyed (Soviet sources)[11] 96 tanks destroyed or crippled (Japanese sources)[12]	526 killed[13] 913 wounded[14]

The Battle of Lake Khasan (29 July – 11 August 1938), also known as the Changkufeng Incident (Russian: Хасанские бои, Chinese and Japanese: 張鼓峰事件; Chinese pinyin: Zhānggǔfēng Shìjiàn; Japanese romaji: Chōkohō Jiken) in China and Japan, was an attempted military incursion by Manchukuo, a Japanese puppet state, into the territory claimed and controlled by the Soviet Union. That incursion was founded in the Japanese belief that the Soviet Union had misinterpreted the demarcation of the boundary based on the Treaty of Peking between Imperial Russia and Qing China and the subsequent supplementary agreements on demarcation and tampered with the demarcation markers. Japanese forces occupied the disputed area but withdrew after heavy fighting and a diplomatic settlement.^[15][7]