KnowraSiege of PetersburgLinked fromLinked fromThe 7 pages that link to Siege of Petersburg, each with the reason it gives.All 7Broader topic 3Related 3Narrower topic 1Robert E. LeeBroader topic: Its eventual collapse forced Lee to abandon Richmond and retreat west.Army of the PotomacBroader topic: The army’s trenches and assaults helped cut Richmond’s remaining supply lines.P. G. T. BeauregardBroader topic: Beauregard’s defense of Petersburg delayed Union forces before Lee arrived.