The Civil War Archive; Union Regiments -- New Hampshire
Korean Conflict Casualty List
WW1 Draft Registration Cards 1917-1918 In 1917 and 1918, approximately 24 million men living in the US completed a World War I draft registration card. These registration cards represent approximately 98% of the men under the age of 46
New Hampshire Civil War Pension Applications a part of the USGenWeb Archives Pensions Project
New Hampshire Heritage 1861-1865 many online rosters here
New Hampshire Pensioners, 1835 this database identifies thousands of New Hampshire soldiers who were covered under various pension acts in the early 1800s
Union Regimental Index: New Hampshire
USIGS Military Collection- Civil War links to surname databases: New Hampshire
Vietnam Conflict Casualty List
Vietnam Veterans Memorial - New Hampshire
War of 1812 Cemetery List of the 205 soldiers who died in the United States Military Hospital at  Williamsville, New York and are buried in the small cemetery, includes the 4th Regiment of lnfantry New  Hampshire
5th New Hampshire Volunteers History
6th New Hampshire Regiment

Additional Resources

New Hampshire Obituaries enter your New Hampshire ancestor's name to search obituaries in over 75 million newspaper pages
New Hampshire Birth Records
New Hampshire Marriage Records
New Hampshire Divorce Records
New Hampshire Death Records