Who were the most important generals in the eastern theater, western theater and the trans-mississippi? and what were some key battles and the role each played in determining the outcome of the war?

The most important generals in the Eastern Theater of the American Civil War were:

In the Western Theater, the most prominent generals were:

In the Trans-Mississippi, the most notable generals were:

Some of the key battles of the war were:

The Battle of Fort Sumter: it took place on April 12 1861 and was the first engagement between both armies.

The Battle of Glorieta Pass (March 1862), which the Union Army won against the Confederates and prevented the South from occupying California.

The Battle of Gettysburg (July 1st - 3rd 1863): considered as a turning point in the Civil War, Southern General Lee was defeated by the Union Army.

i believe we're not a republic so that is a hard question

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes