古マタラム王国
In the 10th century, the rivalry between Sumatran Srivijaya and the Javanese Medang kingdom became more intense and hostile. The animosity was probably caused by Srivijaya's effort to reclaim the Sailendra lands in Java or by Medang's aspiration to challenge Srivijaya domination in the region. In East Java, the Anjukladang inscription dated from 937 mentions an infiltration attack from Malayu — which refers to a Srivijayan attack upon the Medang Kingdom of East Java. The villagers of Anjuk Ladang were awarded for their service and merit in assisting the king's army, under the leadership of Mpu Sindok, in repelling invading Malayu (Sumatra) forces; subsequently, a "jayastambha" (victory monument) was erected in their honor.