Chapter 111: Desperate to retreat after a fierce battle, they were shocked to learn that Zhang Xian had stormed out of the city and broken through the siege.

During this period, 150mm howitzers were divided into several grades. The first grade was those with a total weight of 4.5 tons and a range of about 10,000 to 11,000 meters.

The second tier is 5.5 tons in weight, with a range of approximately 12,000 to 13,500 meters.

The third tier consists of missiles weighing 6.5 tons or more, with a range of up to 18 kilometers.