I te mutunga o te pakanga, kaore i taea e Riker te arahi i tana rerenga i te wa o te whakaekenga o Manassas i te timatanga o Maehe 1862, engari i taea e ia te arahi i ana tangata i muri mai i taua marama ano ki Fortress Monroe, me te toenga o te ope taua o te Potomac, hei waahanga o te McClellan's Peninsula Campaign. I arahi a Riker i tana rerenga ki te pakanga i Williamsburg me te Pakanga o Fair Oaks
i te marama o Mei 1862.