Operation Log is a note found on a US Army Remnant in the Liberty VI Captain's Quarters along with the Recon Bunker Access Code 429A Password.
"[OPERATION: LIBERTY FOUND]
Status Log A3-BX29
Primary target [ALIAS: BISHOP] neutralized before team arrival. No sign of [PACKAGE HOTEL ROMEO] Survivor [ALIAS: ISCARIOT] taken back to Recon Bunker Theta via Vertibird for questioning."