All players are required to build a Cannon during the tutorial.
Clash of Clans Cannon Defensive Strategy
Because Cannons can only attack ground, it’s usually better to place them on the outer part of your base so that defensive targeting troops such as Balloons, Hog Riders or Giants will target and destroy it first.
When initially constructed, the Cannon consists of a short dark metal barrel mounted on a crude four-legged wooden platform.
At level 2, the Cannon’s base receives a wooden stabilizer tied to the legs with ropes.
At level 3, the Cannon’s leg stabilizer becomes stouter. The base itself rotates 45 degrees within the 3×3 square (ostensibly to accommodate the later, larger upgrades of the Cannon).
At level 4, the Cannon barrel receives two decorative latitudinal ridges, one midway along the barrel and one at the rear. The platform’s leg stabilizer is removed in favor of a larger and stouter main support platform with much shorter legs.
At level 5, the Cannonbase’s wooden legs are replaced with metal ones and its metal ring which it pivots on gets wider.
At level 6, the Cannonbase receives a pair of what appear to be metal clamps or straps on opposite sides of the platform to anchor the barrel more firmly to the rotational mount. The pivot it sits on is replace with metal as well.
At level 7, the wooden base is discarded for a white stone or metal platform with four short brass-trimmed legs. The Cannon barrel’s decorative center ridge is trimmed with a ring of brass.
At level 8, the other decorative ridge around the rear of the barrel also receives brass trimming, as well as a pair of opposing brass straps or clamps securing it to the platform.
At level 9, the Cannon receives a third brass-trimmed decorative ridge around the muzzle of the barrel, and two additional brass straps or clamps perpendicular to the first pair. The straps or clamps also receive a bolt on each end.
At level 10, the Cannon barrel is entirely made of brass. The rear of the Cannon barrel receives triangular reinforcing plates, and the platform’s legs become dark metal trimmed in brass with small spikes. The spikes are also gold and made of brass.
At level 11, the Cannon barrel is transformed into black metal, and the base receives prominent black footings.
At level 12, the Cannon is accented with a red ring around the barrel as well as red crystals on each corner of the base to act as the footing, similar to the level 4 X-Bow’s base. The brass strap on the base receives a dark red band. The cannonball it shoots is now a small fireball.
At level 13, the Cannon’s footing are now lined with brass. The outline of the plates at the back of the barrel turn to orange, and the brass strap on the base turn to a dark-gray metal. The barrel is now more sleek, and it is raised. The barrel looks a little shorter than the level 12. The fireball it shoots are bigger than the level 12 Cannon. The barrel is lined with strips fastened with brass nails, and the base has been turned red.