Advanced 1 is the 21st of the 24 Puzzles in Subterfuge.
Maintain Control of Feld.
To see the solution click Expand below.
Send 14 drillers to defeat the general from Wallace. Turn the time dial until it completes that battle. You then have just enough time to send the remaining 8 drillers to destroy the infiltrator and drillers from Kramer, because the general no longer gives it a bonus.