The man was clearly an officer who'd been thoroughly briefed on Coalition officers' capabilities.
Any two of them could make the attack, and had been thoroughly briefed to do so.
He'd been thoroughly briefed on the overall war situation by the Foreign Ministry.
"And you have been briefed thoroughly on your assignment?"
I've been thoroughly briefed and am very familiar with it.
He'd been thoroughly briefed, and from that could pretty much figure things out for himself.
He had been thoroughly briefed on the planned flight procedure.
All of us will be thoroughly briefed, just after dawn.
He'd been thoroughly briefed in the weeks before coming over.
The rest of the humans, including the children, were thoroughly briefed about the new creatures during breakfast.