Over the next four days, five Allied destroyers are lost and others damaged in the area. 26th - Both Boulogne and Calais fall to the Germans. The British Expeditionary Force and French Army fall back on Dunkirk. Every phase of the operation is subject to heavy air, sea and land attack. Forty British, six French and a Polish destroyer take part, together with 800 other vessels, large and small.
Losses are considerable.
The Dunkirk evacuation continues into June. 30th - French destroyers are also continue to suffer losses. Air War - Minelaying continues along the south and east coasts of Britain as well as the waters of Holland, Belgium and northern France during the German Blitzkrieg. Monthly Loss Summary 90 British, Allied and neutral ships of 231,000 tons from all causes.