Rubuta ci gaba don wannan sakin layi - Bayan da ya dawo, Anderson ya shiga rundunar sojojin Potomac a watan Fabrairun 1862 (wanda aka shiga cikin rundunar sojojin Arewacin Virginia daga baya a cikin bazara) a matsayin kwamandan brigade. Anderson ya yi fice a lokacin yakin Peninsula, ya dauki umarni na dan lokaci a Seven Pines
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.