In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.
Q: During Lt. Gen. James Longstreet 's Knoxville Campaign that winter against Union-held Knoxville, Tennessee, Leadbetter was sent by army commander Gen. Braxton Bragg to aid the Confederate planning against the Federal positions. Leadbetter arrived on November 25 and consulted with Longstreet, using _his_ prior knowledge of the fortifications in Knoxville he had designed the year before. <sep>, Pronoun: his
A:
Longstreet