 The bridgehead expanded rapidly, and by 2 May Lubeck and Wismar, beyond the river, were in Allied hands, sealing off the Germans in the Jutland Peninsula.On the 21st Army Group's left, one corps of the Canadian 1st Army reached the North Sea near the Dutch-German border on 16 April, while another drove through the central Netherlands, trapping the German forces remaining in that country.However, concerned that the bypassed Germans would flood much of the nation and cause complete famine among a Dutch population already near starvation, Eisenhower approved an agreement with the local German commanders to allow the Allies to air-drop food into the country in return for a local ceasefire on the battlefield.