Tallmadge, Benjamin (1754–1835), a United States soldier. From 1778 to 1783 Tallmadge was in charge of the major part of General Washington's secret service operations. At the close of the Revolutionary War he held the rank of brevet lieutenant colonel. He served as a Representative from Connecticut in the United States Congress, 1801–17. Tallmadge was born in Brookhaven, New York, and graduated from Yale in 1773.