[sertsa]

It’s from the book “1984”, published in 1949.

[detritus]

Sadly you ignored the main takeaway from the quotation, "ignorance is strength".

[hagbard_c]

Neither of these are applicable to the return of the War Department. This on-the-nose name for the department leaves nothing to guess about its purpose - war clearly is not peace and ignorance of that fact is not strength hence the name War Department instead of Ministry of Peace.