The Military Historical Archive (VHA) is part of the Military Central Archive and its task is to collect, preserve, process and make available documents that have a historical and scholarly importance for the study of military history since 1723.
The following databases can be accessed via the VHA website:

Legionnaires Database
The database was created between 1997 and 2004 at the instigation of General Rudolf Krzák, who was a member of the Czechoslovak legionary community.

Database of members of the Czechoslovak Republic of military units abroad for the 2nd St. war
The database focuses primarily on Czechoslovak citizens and compatriots who served in units of the Czechoslovak exile army or in other allied armies. It also includes persons who were conscripted or registered by Czechoslovak military authorities
in exile, but for various reasons they did not perform military service in the end.

Database of the dead in World War II
The database in the Military Historical Archive was created in 2004–2005

Database of the fallen in the 1st vol. cylinders
The information in this database is based on archival materials stored in the Military Historical Archive (VHA) and includes information about soldiers who died or were declared missing. The database focuses on persons originating from the territory of the former Czechoslovakia, regardless of their nationality (Czechs, Slovaks, Germans, Hungarians, Ruthenians and others).
Database of members of the Czechoslovak Republic of military units abroad for the 2nd St. war
The database focuses primarily on Czechoslovak citizens and compatriots who served in units of the exiled Czechoslovak army or in other allied armies. It also includes persons who were registered by the Czechoslovak military authorities in exile, even if they did not participate in military service in the end.