Enlarged picture
Northern provinces
The defences in the provinces Friesland [left], Groningen [right top] and Drenthe [part of that right bottom]. The defences indicated as O, Q and F were forward defensive shields that were thinly manned and on ocassion even had one or two casemates at their disposal. Nevertheless the O and Q line were penetrated easily by the Germans of the 1st Kavallerie Division.
The A, B, C, G and K lines were imaginary defensive shields. After the foreseen quick loss of the outer defences, the surviving Dutch formations started a run back to the Wonsline.
To the far left the Wonsline and Enclosure dike [Afsluitdijk].
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