How did sides in the american civil war meet demand for large amounts of manpower?

The was a great surge of patriotic volunteers willing to fight for the Union and Confederacy. Both sides inspired many volunteers to join their ranks by invoking patriotism and appealing to a sense of duty (which ultimately worked). There was no general draft or conscription until much later in the war when both sides began lacking soldiers.

So my final answer would be Volunteers!

Hope this helps! :)

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .