▁June ▁to ▁August ▁ 1 8 6 1 . ▁Fort ▁Cor cor an , ▁Def enses ▁of ▁Washington , ▁to ▁October ▁ 1 8 6 1 . ▁Mart ind ale ' s ▁Brigade , ▁Por ter ' s ▁Division , ▁Army ▁of ▁the ▁Pot om ac , ▁to ▁March ▁ 1 8 6 2 . ▁ 1 st ▁Brigade , ▁ 1 st ▁Division , ▁III ▁Corps , ▁Army ▁of ▁the ▁Pot om ac , ▁to ▁May ▁ 1 8 6 2 . ▁ 1 st ▁Brigade , ▁ 1 st ▁Division , ▁V ▁Corps , ▁to ▁May ▁ 1 8 6 3 . ▁ ▁The ▁ 1 3 th ▁New ▁York ▁Infantry ▁must ered ▁out ▁of ▁the ▁service ▁on ▁May ▁ 1 4 , ▁ 1 8 6 3 . ▁Men ▁who ▁had ▁en list ed ▁for ▁three ▁years ' ▁service ▁were ▁cons olid ated ▁into ▁two ▁companies ▁and ▁served ▁duty ▁as ▁Prov ost ▁Guard , ▁ 1 st ▁Division , ▁V ▁Corps , ▁April ▁ 2 7 ▁to ▁June ▁ 2 3 . ▁These ▁two ▁companies ▁ceased ▁to ▁exist ▁on ▁June ▁ 2 3 , ▁ 1 8 6 3 ▁when ▁its ▁members ▁were ▁transferred ▁to ▁the ▁ 1 4 0 th ▁New ▁York ▁Infantry . ▁ ▁D etailed ▁service ▁Left ▁New ▁York ▁for ▁Washington , ▁D . ▁C ., ▁May ▁ 3 0 . ▁Camp ▁on ▁Mer id ian ▁Hill , ▁def enses ▁of ▁Washington , ▁until ▁June ▁ 3 , ▁ 1 8 6 1 , ▁and ▁at ▁Fort