The bombing of Chongqing (, Japanese: 重慶爆撃 , from 18 February 1938 to 23 August 1943) was part of a terror bombing operation conducted by the Imperial Japanese Army Air Service and Imperial Japanese Navy Air Service on the Chinese provisional capital of Chongqing, authorized by the Imperial General Headquarters.
Chongqing was being bombed 2 years after the beginning of the bombing of Chongqing.
The context states that the bombing of Chongqing occurred from 18 February 1938 to 23 August 1943. I said that Chongqing was stilled being bombed two years after the beginning of the bombing, which would be 1940. The model likely struggled with this because there was no mention of a two year span in the context.