主题：【原创】中国空军从军记 -- 亦无用

- "pre Lend-lease" 22 June 1941 to 30 September 1941

- first protocol period from 1 October 1941 to 30 June 1942 (signed 1 October 1941)

- second protocol period from 1 July 1942 to 30 June 1943 (signed 6 October 1942)

- third protocol period from 1 July 1943 to 30 June 1944 (signed 19 October 1943)

- fourth protocol period from 1 July 1944, (signed 17 April 1945), formally ended 12 May 1945 but deliveries continued for the duration of the war with Japan (which the Soviet Union entered only 8 August 1945) under the "Milepost" agreement until 2 September 1945 when Japan capitulated. 20 September 1945 all Lend-Lease to Russia was terminated.