although the battle Hostile_encounter itself was inconclusive , the union army 's repulse Defending of two confederate Collaboration attacks Attack and the subsequent confederate Collaboration withdrawal Escaping were a much-needed Assistance boost Cause_to_make_progress to union morale after the defeat Conquering at the battle Hostile_encounter of fredericksburg , and it dashed Attack confederate Collaboration aspirations for control Control of middle tennessee .