Who were the participants in the tripartite struggle in northern India from the 8th to the 10th Century?

The Tripartite Struggle was a prolonged, multi-generational conflict that took place between the Palas of Bengal, the Gurjara-Pratiharas of Malwa, and the Rashtrakutas of the Deccan. The core focus of this century-long conflict was to establish geopolitical control over the prized imperial city of Kannauj, which symbolized sovereignty over the fertile Indo-Gangetic plains.