Could the detour be Crawl or Code? Perhaps Brawn or Brain?
Wire Crawl vs Wire Comms? Barbed Wire vs Telegraph Wire?
Does it look like an overnighter to Verdun, and a staggered start at the chateau?
"DETOUR. Two important tasks were related to trench warfare during World War One in France. (1) UNDER WIRE
and (2) OVER WIRE
In Under Wire teams must crawl one hundred meters on their bellies under a canopy of barbed wire during an artillary barrage and air bombardment. When they have reached their destination, the officer will give them their next clue. A physically challenging task, but if they do not get caught on the pointed barbs, they will complete the task in a short time. In Over Wire teams must travel across the battle field stringing a line of communication wire from the command post to the observation post, and then using morse code to transmit a message back to the CP. If the message is transmitted correctly, and the team member can deceiver the coded message, the officer in charge will give them their next clue."