Go to your library and get "A Compendium of the War of the Rebellion" by Frederick H. Dyer. This will list all the campaigns of this outfit in Vol. II.
Next get "The Union Cavalry in the Civil War" by Stephen Z. Starr. Its well indexed and Vols I & 2 cover the war in the East.
While you are there, look for the "War of the Rebellion, the Official Records of the Union and Confederate Armies" published by the US Govt. This contains after action reports by commanders regarding the battles their outfits fought in, Its huge, (128 vols.)but is a gold mine of info.
If your library doesn't have it, its at the website ehistory.com.
You may also want to contact the national archives or the link below about getting your uncle's records.
James B. Ronan II
To Join the Company of Military Historians click here