Answer:
soldiers on horseback _ Cavalry
soldiers on horseback_ infantry
Withdraw formally from membership of a federal union or an alliance, or a political or religious organization__ secede
Required all able-bodied white men between the ages of 18 and 35 to serve for three years in the military.____Draft
An attempt to stop the imports of war supplies._____ blockade
To surround an area and bombard the enemy until they surrender___Siege
A war between citizens of the same country____Civil war