Diplomacy 1 is the 10th of the 24 Puzzles in Subterfuge.
Ensure your ally keeps Kyburz.
Subterfuge requires you to be a good strategist AND a good diplomat. It's hard to win without allies. Your ally (brown) needs help defending against an attack by your opponent (sky). Gift your ally some drillers to help them hold Kyburz.
You can gift drillers by sending them aboard a sub and tapping the 'gift' button in the sub's info panel to gift them.
To see the solution click Expand below.
Send a 5 driller sub from Calhamer to your ally's outpost Kyburz. With the sub selected, tap the gift icon.