Which two armies fought the last battles of the civil war

At the point when was the Civil War battled? The war started when the Confederates shelled Union officers at Fort Sumter, South Carolina on April 12, 1861.  

Explanation:

The war finished in Spring, 1865. Robert E. Lee surrendered the last significant Confederate armed force to Ulysses S. Concede at Appomattox Courthouse on April 9, 1865.The Confederate States of America was an accumulation of 11 expresses that withdrew from the United States in 1860 after the race of President Abraham Lincoln. In the wake of enduring a devastating thrashing in the Civil War, the Confederate States of America stopped to exist

it's not the readmission