Military Service Records, Archives and Resources

Fold3 - 7-day free trial available

US Fold3
Monthly or annual membership.
Owned by Ancestry.com, Fold3 features premier collections of original military records. These records include the stories, photos and personal documents of men and women who served. Many of the records come from the U.S. National archives, the National Archives of the U.K. and other international records.
Note: 'All Access Membership' of Ancestry includes membership of Fold3.

Forces War Records

UK uk.forceswarrecords.com
Monthly or annual membership.
Also owned by Ancestry.com. Over 620 million military records from the French Revolution, the War of 1812, WWI and WWII and more.
Note: 'All Access Membership' of Ancestry includes membership of Forces War Records.

British Medal Forum

britishmedalforum.com
Are you struggling to identify a medal, ribbon or clasp? Registration is free.

British Military Lists 

digital.nls.uk
British officers in the Army (1839-1950), Navy (1913-1944) and  Royal Air Force (1919-1945).
Includes Weekly Casualty Lists (1917-1919).

Commonwealth War Graves Commission (CWGC) 

cwgc.org
The CWGC is a global organisation, caring for war graves at 23,000 locations in more than 150 countries and territories. They commemorate almost 1.7 million individuals, ensuring that all the Commonwealth men and women who died during both world wars are remembered.

Great War Forum

greatwarforum.org
A superb go-to site to discuss all aspects of the the First Word War (1914-1918). Sign up and in all probability a community member will answer your burning question. 

Imperial War Museums - Tracing Your Family History

iwm.org.uk
The IWM have created family history guides covering the British Army, Royal Flying Corps (RFC), Royal Air Force (RAF), Royal Navy, Merchant Navy, Prisoners of War (POW) and US forces in Britain.

International Red Cross Archives - First World War Prisoners

grandeguerre.icrc.org
5 million index cards for WW1 prisoners and detainees.

Irish Great War Dead Archive

irishgreatwardead.ie
An ongoing project to record the names of the Great War dead from the six counties in Northern Ireland. Many include useful notes.

National Army Museum

nam.ac.uk
The museum tells the story of the British Army from the Battle of Agincourt in 1415 through to the 21st century.

The Ogilby Muster

theogilbymuster.com
Holds archival material found in the Regimental and Corps Museums of the British Army. This includes photographs, documents, maps, audio and visual footage. Create a free account to save records of interest.

Royal Navy: First World War - Lives at Sea

royalnavyrecordsww1.rmg.co.uk
Search for information about Royal Navy officers and ratings who served during the First World War.

War Memorials Register UK