1914-1918-online – International Encyclopedia of the First World War is an English-language online reference work on World War One. Launched in October 2014, the multi-perspective, public-access encyclopedia is a collaborative project by the largest network of WW1 researchers worldwide, spanning more than 50 countries. 1914-1918-online features innovative navigation and search functions based on semantic wiki technology and will eventually contain more than 1,000 articles.

Since March 2016, “1914-1918-online” is being expanded and enhanced with alternative procedures. This is part of the DFG-project “Open Encyclopedia System”, which is carried out together with the Center for Digital Systems, the Center for Modern Greece and the Bavarian State Library. The emphasis of the functional expansion is to develop the encyclopedia from a uni-directional publishing environment to an interactive work and publishing environment. The core areas of this expansion include the updating of electronic publications and the explorative development of functionalities for user participation. The editorial and publication platform of “1914-1918-online” will be migrated to the “Open Encyclopedia System”.