Hammer of Krahka

The Hammer of Krahka (the Hammer) was a massive quake tower built in the Kozu stronghold of Krahka on the planet Yavia. It was the largest quake tower known to be built in history. It saw use at the battle of Krahka, forcing the Republic forces to cede defeat, although the Jedi would eventually manage to force the Kozu to surrender.

Physics
The weapon was equipped with a drop-weight weighing 150,000 tonnes. The weight was lifted 340 meters before being dropped into the quake pit. The collision with the ground unleashed 20psi overpressure for 2 km, obliterating everything within that radius, and severely damaging (5psi) everything within 10 km of the blast epicenter.

Strategic Location
The Hammer of Krahka was located near the stronghold of Krahka on the Krahka peninsula. It lay between the 2 large mountains. The stronghold of Krahka was located over a lake at the foot of a third mountain, and 2 smaller mountains stood between the quake tower and Krahka. An enemy was forced to pass throught the gorge where the quake tower was located.

History
When the republic discovered Kozu's dealings with the CIS, they sent an army to Krahka to capture the Kozu King. Due to its size, the Hammer of Krahka was hardly discernable from the mountain gorge. The use of the Hammer was a last resort, since it could result in collateral damage. However, the Kozu lord decided to use it when Krahka's outer defences were overrun. The tower's collosal weight was dropped a total of 14 times, killing more than 100,000 clone troopers and about as many separatist droids.

The Republic forces regrouped after initial defeat. The clone army was eventually able to infiltrate Krahka, and take the King hostage. The Kozu were then forced to surrender.

After the battle, the Republic forces managed to partially disable the Hammer (it was too large to destroy). It is rumoured the quake tower may have been reactivated.