Deploy Cadet Soldiers on the Island
If you've been going through the game in a linear fashion, you will have just completed the tutorial, and will likely need to wait a matter of 3-4 minutes for your first Barracks to finish training your Cadet Soldiers. Once that's done, simply click on your Barracks when the symbol of the Cadet is floating above it to pull the soldiers from the Barracks. You can then place them anywhere on your map to finish this quest, being rewarded with 50 Wood in the process.
