An after action report was a type of report used by Starfleet during the Dominion War.
In 2375, Captain Sisko would use an after action report submitted by Worf to confront Gowron about his orders that caused the destruction of 7 warships and damaged 5 more, as well as putting Martok into sickbay. (DS9 episode: "Tacking Into the Wind")
Later the same year, Captain Sisko referenced an after action report from AR-558 that said Reese had saved Sisko's life. (DS9 short story: "Requital")