Professor Wayne Wei-Sian Hsieh talked about the army doctrine employed by top generals in the Union and Confederate armies, and the resulting course of the war. 
“Old Army Doctrine and the Practicalities of Waging War in 1861” was a presentation at the 29th annual summer conference of the Civil War Institute at Gettysburg College, “Mobilizing for War and the Battle of First Manassas/Bull Run.”