=== Civil War (1861–1865) ===
See [[Massachusetts in the Civil War|Massachusetts in the Civil War]] for information about Massachusetts Civil War records, web sites, etc. with links to articles about the Massachusetts regiments involved in the Civil War. The regimental pages often include lists of the companies with links to the counties where the companies started. Men in the companies often lived in the counties where the companies were raised. Knowing a county can help when researching the families of the soldiers.