The Chola Empire (Tamil: [t͡ʃoːɻɐɾ, soːɻɐɾ]), which is often referred to as the Imperial Cholas, was a medieval thalassocratic empire based in southern India that was ruled by the Chola dynasty, and comprised overseas dominions, protectorates and spheres of influence in southeast Asia.
The power and the prestige the Cholas had among political powers in South, Southeast, and East Asia at its peak is evident in their expeditions to the Ganges, naval raids on cities of the Srivijaya Empire on the island of Sumatra, and their repeated embassies to China. The Chola fleet represented the peak of ancient Indian maritime capacity. Around 1070, the Cholas began to lose almost all of their overseas territories but the later Cholas (1070–1279) continued to rule portions of southern India. The Chola empire went into decline at the beginning of the 13th century with the rise of the Pandyan dynasty, which ultimately caused the Chola's downfall.