. ▁From ▁Bridge port , ▁Hook er ▁march ed ▁his ▁force ▁towards ▁Ch att ano oga ▁to ▁particip ate ▁in ▁the ▁fighting ▁to ▁rel ieve ▁the ▁Army ▁of ▁the ▁C umber land . ▁ ▁Atlanta ▁Camp aign ▁ ▁Petersburg ▁Camp aign ▁ ▁At ▁the ▁conclusion ▁of ▁the ▁Over land ▁Camp aign ▁in ▁ 1 8 6 4 , ▁L T G ▁Grant ▁directed ▁M G ▁Me ade ▁to ▁transfer ▁his ▁Army ▁of ▁the ▁Pot om ac ▁to ▁the ▁south ▁side ▁of ▁the ▁James ▁River ▁in ▁effort ▁to ▁capture ▁the ▁Confeder ate ▁rail ▁center ▁of ▁ ▁Petersburg ▁and ▁sever ▁Richmond ’ s ▁supply ▁lines . ▁ ▁The ▁Union ▁did ▁not ▁capture ▁Petersburg ▁before ▁the ▁city ' s ▁def enders ▁were ▁rein for ced ▁by ▁troops ▁from ▁General ▁Lee ' s ▁Army ▁of ▁Northern ▁Virginia . ▁ ▁The ▁contin ual ▁Union ▁movement ▁towards ▁the ▁Confeder ate ▁fl anks ▁gave ▁way ▁to ▁dig ging ▁as ▁sie ge ▁operations ▁to ▁isol ate ▁the ▁Confeder ate ▁capital ▁began ▁in ▁earnest . ▁ ▁L T G ▁Grant ▁established ▁his ▁headquarters ▁on ▁the ▁grounds ▁of ▁App om atto x ▁Man or ▁over looking ▁the ▁confl u ence ▁of ▁the ▁App om atto x ▁and ▁James ▁rivers . ▁ ▁City ▁Point , ▁Virginia , ▁modern ▁day ▁Hope well , ▁became ▁the ▁principal ▁log ist ical ▁base ▁for ▁the ▁Virginia ▁the ater ▁supp lying ▁the ▁troops ▁of ▁both ▁Me ade ' s ▁Army ▁of ▁the ▁Pot om ac ▁and ▁M G ▁Benjamin ▁Butler ’ s ▁Army ▁of ▁the ▁James . ▁ ▁In