These are all residents of Calais. The third line down indicates that Henry C. Copeland, is 31 years old, a merchant, and born in Maine. On the right hand page, under Remarks, is written "Disability" and the number "2." It looks like this second great grandfather didn't serve in the Civil War due to a claim of a disability, but I'm not sure what his disability was.
Military Monday is a daily blogging prompt from Geneabloggers, the genealogy community's resource for blogging. It is used by many genealogy bloggers to help them tell stories of their ancestors.