Rike ci gaba don wannan sakin layi - Saboda kotun kotu, Riker bai iya jagorancin rundunarsa ba a lokacin da aka ci gaba da Manassas a farkon Maris 1862, amma ya iya jagorancin mutanensa daga baya a wannan watan zuwa Fortress Monroe, tare da sauran sojojin Potomac, a matsayin wani ɓangare na McClellan's Peninsula Campaign. Riker ya jagoranci rundunarsa a yakin Williamsburg da yakin Fair Oaks
a watan Mayu 1862.