Answer:
infantry tactics
Explanation:
Soldiers were drilled in infantry tactics, usually based upon a manual written before the war by West Point professor William J. Hardee (Rifle and Light Infantry Tactics: for the Instruction, Exercise and Maneuver of Riflemen and Light Infantry, published in 1855).
The U.S.A., U.K., France, Cuba, China, Canada, and many many others.
The Compromise of 1876 was a promise between Republican presidential candidate Hayes and Democrats in Congress. If the Democrats agreed to his election, he would recognize Democratic control of the South. Hayes also included a promise to withdraw troops from the south in his campaign