Proper noun
Dyle
River in Belgium, flowing through Leuven and Mechelen
Allied planners had hoped to check the Germans at the Dyle Line—a defensive line that ran from south to the French frontier, north of —but by May 16 Gamelin had determined that such a stand was impracticable. Source: Internet
Soon the Allied infantry could no longer keep up, but their cavalry were off the leash, heading through the gathering night for the crossings on the Dyle river. Source: Internet