The document summarizes events that occurred in the 11th century in Tamil Nadu, India. It discusses how a Chola king conquered parts of Sri Lanka and installed a local governor to rule the area. It then mentions that the Chola dynasty controlled much of South India and practiced an advanced naval-based military strategy under the rule of Raja Raja Chola I. Finally, it notes that Hinduism and Tamil culture flourished during this time in the Chola kingdom.