The blitzkrieg method was never again successfully used. The scale and the shape of northern France had provided the perfect board for this exciting game. [..] And yet before we declare PLAN YELLOW to be the only successful blitzkrieg, it is worth looking at the declared objectives of that offensive. One stated aim was to engage and defeat the strongest possible part of the Allied armies. Hitler had specifically ordered the annihilation of the BEF and that it should be prevented from escaping across the Channel. The Germans had failed in that endeavour. It was to prove a fatal flaw.

— Blitzkrieg by Len Deighton (Page 327)