Binnenlandse Strijdkrachten

The Binnenlandse Strijdkrachten (BS; English: 'Domestic Armed Forces'), fully the Nederlandse Binnenlandse Strijdkrachten (NBS), was a government-sanctioned union of Dutch resistance groups during the German occupation of the Netherlands in World War II, which had hardly cooperated until then. == History == Until 1944 the resistance groups, insofar as they were in contact, worked independently under the supervision of the Bureau Bijzondere Opdrachten (BBO, 'Office of Special Assignments') of the Dutch government-in-exile in London.

Source: Wikipedia — Binnenlandse Strijdkrachten (CC BY-SA 4.0)