YOU SAID:
The events at nanjing never happened
INTO JAPANESE
南京での出来事は決して起こりませんでした
BACK INTO ENGLISH
The event in Nanjing never happened
INTO JAPANESE
南京での出来事は決して起こらなかった
BACK INTO ENGLISH
What happened in Nanjing never happened
INTO JAPANESE
南京で起こったことは決して起こらなかった
BACK INTO ENGLISH
What happened in Nanjing never happened
That didn't even make that much sense in English.