What are the reasons for the rise of Assyria?

The reasons for the rise of the Assyrian state, especially in its transformation into an empire in the 7th century BC, was its army and military system. This army consisted of many types of troops, which were well coordinated. The striking force of this army was the war chariots. In Assyria, the first to widely use cavalry and engineering troops, which helped in the siege of cities and when crossing wide rivers. They built towers, catapults, battering rams and other siege weapons, built bridges and set up a marching camp, which was the prototype of future Roman camps. The Assyrians used night attacks and assault troops for surprise attacks.