Gen. Irvin McDowell led his unseasoned Union Army across Bull Run against the equally inexperienced Confederate Army of Brig .

McDowell 's ambitious plan Arranging for a surprise flank attack Attack on the Confederate left Departing was poorly executed by his officers and men ; nevertheless , the Confederates , who had been planning Arranging to attack Attack the Union left Departing flank , found Know themselves at an initial disadvantage .

McDowell 's men frantically ran Self_motion without order Arranging in the direction of Washington , D.C .

McDowell , with 35,000 men , was only able to commit Commitment about 18,000 , and the combined Cause_to_amalgamate Confederate Collaboration forces , with about 32,000 men , committed Commitment only 18,000 .

Entering Self_motion the final Competition round Competition , Graeme McDowell and Snedeker were tied Connect for second at 203 ( −7 ) , four strokes behind Scott .

McDowell shot Motion a 75 ( +5 ) and Snedeker a 74 to knock Motion them out of contention Quarreling ; Woods had a triple bogey at the sixth hole and carded Getting a 73 to tie Connect for third with Snedeker .

The next day , union miners killed Killing superintendent McDowell and 18 of 50 strikebreakers and mine guards , many of them brutally .