Revolutionary War Records
Fold3, in partnership with the National Archives, has scanned and indexed Revolutionary War records including the pension and bounty-land warrant and war rolls. Index is free; images have a fee.
Revolutionary War Military Records 1775-1783
Ancestry.com has over 2 million names and more than 20,000 images from the Revolutionary War in 33 databases of military records — from state militia records to war service records to officer listings. Index is free, Images are a fee.
Civil War Collection Ancestry.com's huge Civil War collection includes soldier profiles, draft registrations, pension indexes, POW cords, service records, headstones and much more.
Civil War Records
Fold3 has worked with the National Archives to put online over 30 millon Civil War records of Union and Confederate soldiers.
Civil War Soldiers and Sailors System
National Park Service database of the men who served in the Union and Confederate armies during the Civil War. Also includes histories of regiments, lists of prisoner-of-war records and cemetery records.
United States Civil War Soldiers Index
The National Park database at the Mormon genealogy web site. Although it is the same database as the NPS above, it has a different search engine with different filters, therefore it may be possible to find soldiers not found in the NPS database.
Civil War Soldiers in the Census
The 1840, 1890, and 1910 census lists veterans and pensioners. Available at Ancestry.com.
1890 Military Census Family Search 1890 census lists Civil War survivors and widows. Available at the Mormon genealogy site.
Pension Records Civil War pension Records are indexed images of the Bureau of Pensions and Veterans Administration cards used to record the payment of pensions to veterans, their widows or dependents available at the Mormon Genealogy site, FamilySearch
Great White Fleet
Names of over 14,000 sailors who sailed with the Great White Fleet - a peacetime goodwill tour of the U. S. Battle Fleet sent by President Teddy Roosevelt that sailed around the world from 1907 until 1909.