They should be great at advancing forward, especially against Poland and France.
Explanation: This joke plays on historical references related to Germany’s involvement in both World Wars, particularly against Poland and France. The humor lies in the implication that a German football manager might “advance forward” successfully against these nations, echoing Germany’s military advances during the wars. The joke uses this historical context to create a dark, tongue-in-cheek twist about football strategy, though it touches on sensitive subjects.