King Wonjong of Goryeo vs Mahendravarman I

King Wonjong sent his son (future King Chungnyeol) as a hostage to the Mongol court and agreed to Goryeo becoming a vassal state of the Mongol Empire. This ended decades of military resistance and established a tributary relationship that lasted for nearly a century.

After the death of King Gojong, Wonjong returned from the Mongol court where he had been held as a hostage. He was installed as king with Mongol approval, marking the beginning of direct Mongol influence over Goryeo's throne.

King Wonjong ordered the dissolution of the Sambyeolcho, a elite military unit that resisted Mongol domination. The Sambyeolcho rebelled and held out on Jeju Island until 1273, when Mongol-Goryeo forces crushed them, ending organized military opposition to Mongol rule.

Mahendravarman I excavated the first rock-cut cave temple at Mandagapattu, dedicated to Brahma, Vishnu, and Shiva. This innovation initiated the Pallava tradition of rock-cut architecture, influencing later temples across South India.

Mahendravarman I initially patronized Jainism and built Jain cave temples, such as the one at Sittannavasal. He later converted to Shaivism under the influence of the saint Appar, reflecting religious shifts in the Pallava court.

Mahendravarman I suffered a military defeat against the Chalukya king Pulakeshin II, who invaded the Pallava kingdom. This loss resulted in the temporary loss of northern territories and demonstrated the military rivalry between the Pallavas and Chalukyas.

Mahendravarman I built the Shore Temple, a structural granite temple at Mamallapuram. This temple is a major example of early Dravidian architecture and a UNESCO World Heritage site. It was dedicated to Shiva and marked a shift from rock-cut to structural temple building.