What roll, beside militia unit cook did Hannibal Hamlin during the Civil War? I know he was vice president, but exactly what did he do as vice president? Hamlin did was not close to President Lincoln and did not attend cabinet meetings. Hamlin rarely visited the White House and I am uncertain Lincoln assigned him much responsibilities. Lincoln did not have him run as VP in 1864. Was Hamlin's biggest contribution to the Union War effort an activated militia cook?