【Notice】Actually, you cannot see the traps on the screen at first.
First, deploy Goblins on point A and point B in the following picture, in order to take out traps.
Next, deploy about 10 Barbarians and 3 Wall Breaker on point C to take out a Mortar. If your Wall Breakers are upgraded to over level 3, you can take out the walls by 2 Wall Breakers.
Finally, just drop 80 Barbarians on point B.
In the following video, Barbarian, Goblin and Wall Breakers are upgraded to level 4.
In the following video, the player deploy 2 Goblins to take out the traps in the entrance of the village.
He deploys Goblins and Wall Breakers. While a Cannon is attacking Goblins, Wall Breakers take out the walls.
After the walls are gone, he deploys 20 Barbarians.
After the Mortar is gone, he deploys 107 Barbarians in the entrance of the village.
This mission is accomplished!
[Level 17 - WatchTower] Hints & Tips