Kammala jumla mai zuwa: Bayan da ya dawo, Anderson ya shiga rundunar Sojoji na Potomac a watan Fabrairun 1862 (wanda aka shiga cikin sojojin Arewacin Virginia daga baya a cikin bazara) a matsayin kwamandan brigade. Anderson ya bambanta kansa a lokacin yakin neman zabe na Peninsula, yana daukar nauyin kwamandan kwaminisanci a
Bakwai Pine lokacin da Longstreet ke aiki a matsayin kwamandan reshe. A Bakwai Pines ya sami sunan "Fighting Dick", kuma an ci gaba da shi zuwa babban janar a ranar 14 ga Yuli kuma ya karbi umurnin Janar Benjamin Huger na tsohon sashen. A matsayin wani ɓangare na Longstreet, Anderson ya yi yaƙi a Bull Run na biyu. Ƙungiyarsa ta shiga cikin layin tsaro na karshe na Union a kusa da Henry House Hill, amma rana ta fara sauka kuma bai ci gaba da kai hari ba.