77 years ago today (5/26-6/4), when the British army and its allies were surrounded by the German army in the Second World War, the attack and defense were lost, and they were unable to advance or retreat. At this time, the British army ordered a retreat.
This can be said to be a courageous decision popular database when the German army won an overwhelming victory, the two sides continued to exchange fire fiercely, and the retreat plan was difficult to implement. If the retreat fails, it means that the British Expeditionary Force will be completely wiped out, and it also means that Britain will lose its ability to resist the German army.
Nothing could stop the Germans from unifying Western Europe. Without this successful retreat, the entire history of World War II would have been rewritten, without the subsequent landings in Normandy, and without the final demise of Nazi Germany.