"Petersburg (The Breakthrough)" . . . . "breakthrough at Petersburg" . . . . . . "Petersburg, Virginia" . . . . . . . . . . . "Unionvictory:" . "assault on Fort Gregg" . . . . . . . . . . . . . . . . . . . . . . "fall" . . . . . . . . . . "Third Battle of Petersburg" . . . . . "* Fall of Richmond on April 3, 1865" . . . "general assault of April 2" . . . "fall of Petersburg" . . . . . . . . "Battle of Fort Gregg" . "Third Battle of Petersburg" . "40\u201345,000" . "Assault on Ft Gregg-Fall of Petersburg" . . . "decisive breakthrough" . "Petersburg breakthrough" . "Grant going through Richmond" . "Third Petersburg" . . "Confederate States" . . "Fort Mahone" . . . . . . . . "Battles of Fort Gregg and Whitworth" . . . . . . . "114,335" . . . . "Fort Gregg" . . "\u223C 63,000 (engaged)" . . . . . . "Petersburg Breakthrough" . . . . . . . . "3rd Battle of Petersburg" . . . "break through" . . . . "1865-04-02" . "attacked" . . . . . . . . . . . . . . . "* End of theSiege of Petersburgand opening of theAppomattox Campaign" . . . . . . . . "the final Petersburg assault" . "3,936" . "Battle of Petersburg" . . . "Assault and fall of Petersburg" . . "Fall of Petersburg" . . . . "United States" . "Petersburg III, Virginia" . . . . "Breakthrough at Petersburg" . . . . "Union breakthrough at Petersburg" . . . . . . . "Forts Gregg and Whitworth" . "final assault on Petersburg" . . . . . . "Petersburg" . . . . "18\u201320,000 (engaged)" .