The forty-two encampments from Egypt to Eretz Yisrael are enumerated. Obviously, some places left stronger impressions than others. The summary alludes to the forty year history with its ups and downs. Horav Nissan Alpert, zl, claims that one can and should make every effort to learn from his mistakes. Thus, he will be able to perceive his shortcomings, what provokes him to sin, what intimidates him and what inspires him.
People are regrettably inclined to white wash their past faults.
They choose to remember only the positive moments, the times when they demonstrated courage and resolve, when their conviction held the central role in their lives. This may represent human nature. Nonetheless, by relegating our negative experiences and actions to the side, we are tossing away the opportunity for self-improvement. This is one time that emphasizing the positive is not constructive. Thus, Hashem commanded Moshe to detail every one of their encampments.