The Netherlands Institute of Military History (NIMH) possesses some 2500 metres of documentation collections.
In the NIMH collections are to be found mainly documents about the Second World War, among which:
- battle reports about the German invasion of 10-14 May 1940, the war in the Netherlands East Indies in 1942 and military operations in the Netherlands East Indies (1945-1949);
- German attack plans against the Netherlands (among others the Von Sponeck papers);
- staff- en information maps of Dutch resistance during World war II;
- the London Merchant Shipping Collection, containing detailed notes and service records of 30.000 Dutch and foreign sailors who risked their life for the allied cause on board Dutch merchant ships between 1940-1945;
- airplane crash files;
- newspaper articles on the liberation of the Netherlands;
- documentation on the deployment of naval vessels and marines during World War II.
Other highlights are:
- an extensive collection of topographic and military maps of the Netherlands, the Netherlands East Indies and Korea;
- various historical engravings, atlases, technical drawings and floor plans;
- reports of Dutch UN-units;
- an extensive documentation on all ships of the Royal Netherlands Navy from the 17th century and all air plane types of the Royal Netherlands Air Force;
- the archives of the Military Aviation Branch of the Netherlands East Indies Army (ML-KNIL), containing photos and documentation;
- documents on naval heroes such as Tromp and De Ruyter.