The "rolling" defense tactic has been practiced by the US Army several times.
Initially, Pershing did not quite understand.
Perhaps because of his long-term study of Shire's tactics, he was habitually trying to apply the armored army penetration tactics used by Shire, hoping to learn this strategy.
"I thought tanks should be used for offense, Vice Admiral," Pershing said. "We should be looking to attack the enemy's weak spots with armored units, not use them for... this kind of defensive tactic!"
Shire reminded him: "American characteristics, General, think of American characteristics!"
Pershing still did not understand:
"But even with American characteristics, we shouldn't change direction completely."
"Please forgive me, Vice Admiral, I'm not questioning your ideas."
"I'm just saying, it's hard to accept, I mean, it's changing from offensive to defensive!"
