2 Civil War CVD Photo's - Union soldier and a Confederate soldier - Anyone recognize them?

[bcover]

Does anyone recognize these 2 guys. Looks like a Union soldier on the left and a Confederate soldier on the right.  Nothing on the the back of the cards. Any help is appreciated.

Thanks!

[bcover]

The Union guy on the left may be and early Maj. General Daniel E. Sickles. 

The Confederate guy on the right may be Lt. General Ambrose Powell Hill.

Just a guess.  

[bcover]

Confederate guy may be James R. Chalmers Brigadier General 

https://en.wikipedia.org/wiki/James_Ronald_Chalmers

[bcover]

He might be be Thomas Wilberforce Egan.

https://en.wikipedia.org/wiki/Thomas_W._Egan