The first $1 bill was made in 1862, according to The Dollar Bill Collector. The bill was considered legal tender and includes a portrait of Abraham Lincoln's Treasury Secretary, Salmon P. Chase.
According to The Dollar Bill Collector site, in 1868 the $1 bill was reissued as a silver certificate, exchangeable for a $1 silver coin. Rising silver prices drove the treasury to change over to Federal Reserve Notes in 1963, and the bills were redesigned. Although George Washington's portrait was added to the $1 bill, Salmon P. Chase was not forgotten, as his portrait appeared on the $10,000 bill issued from 1928 to 1946.