Decline of the Sena Dynasty in Bengal (1180s)

Timeline

1. 1181–1184Bengal Delta · BengalIn the early 1180s the Sena king's control over local governors and temple lands weakened, and the efficiency of tax collection and military mobilization declined. Court succession disputes and aristocratic fragmentation worsened the decline of royal power; Bengal's prosperous trade networks survived but were no longer coordinated by a strong center.
2. 1185–1188Bihar · BiharThe Sena dynasty's control over its western frontier and the Bihar interior loosened, and its traditional defensive lines could no longer effectively block infiltration from the northwest. The once-powerful Bengal navy also shrank due to financial difficulties, leaving obvious gaps in eastern coastal defenses.
3. 1189–1190Bengal · BengalBy the late 1180s the Sena dynasty was on an irreversible path of decline. After conquering Punjab, the Ghurid forces from the northwest grew ever more aggressive in their eastward advance, while the Senas were incapable of organizing effective alliances or reforms. The dynasty's cultural legacy survived, but its political and military capacity was no longer sufficient to maintain its status as an independent power.