Describe the military achievements of Rajaraja Chola and Rajendra Chola

Chola inscriptions mention numerous regiments by specific names. Rajaraja Chola I created a powerful standing army and a considerable navy, which achieved even greater success under his son Rajendra Chola I than under himself. The army consisted of the Infantry, Cavalry and Elephant corps. There is no evidence for the traditional Chariot corps found in ancient Hindu literature. There were other specialist infantry such as bowmen (villaligal). At its peak Cholan army is said to have two million soldiers fighting for their Kingdom at many fronts simultaneously.