1st Regiment, Maine Heavy Artillery

Brief History
The 1st Regiment was originally recruited and organized as the 18th Maine Infantry. It mustered in August 21, 1862 at Bangor, Maine. It was in service for three years and one month. It was discharged September 20, 1865

For more information about the regiment and its history,see:

The First Maine Heavy Artillery, 1862-1865: a History of its Part and Place in the War for the Union, with an Outline of Causes of War and its Results to Our Country  FHL fiche 6082974(6 fiche).

The Wikipedia article, 1st Maine Heavy Artillery, gives more historical information about this regiment.

Companies in this Regiment with the County of Origin
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.