102nd Regiment, New York Infantry National Guard (100 days, 1864)

Brief History
This regiment mustered in for 100 days' United States service on August 6, 1864. It's duty was in Elmira, Chemung, N. Y., until November, 1864. The regiment was mustered out on November 13, 1864.

The New York State Military Museumwebsite has a unit history project page for the 102nd Regiment, New York Infantry National Guard (100 days, 1864)

Companies
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.

Source Materials
New York in the War of the Rebellion, 1861 to 1865, by Frederick Phisterer (Albany : J.B. Lyon, 1912). Google Books, other libraries with this book, FHL book 974.7 M2p, FHL film 1486494-1486496