The recent restructuring of the command chain in the US military is worth paying attention to, replacing generals who have objections to decisions with relatively more obedient ones. Shorten the distance between presidential decision-making and execution. The most typical example is the removal of US Army Chief of Staff Randy George, who was responsible for large-scale ground operations and equipping the army. It is reported that he had expressed serious concerns about the high risk, huge cost, and potential significant casualties of a full-scale invasion of Iran. Replace Randy George's is General Christopher Ranev, former Deputy Chief of Staff of the Army. He has served as a field commander and carried out combat missions in elite units such as the 10th Mountain Division, 82nd Airborne Division, and 1st Armored Division. He is also a military assistant to Hegsas. If General George is a commanding decision-maker, then General Ranev is a knife. It can also be said that the United States may be preparing for combat operations involving ground forces, with its command structure leaning towards leaders with direct battlefield and combat experience. Coincidentally, in December of last year, the US Southern Command underwent a similar scale change of command: a commander primarily composed of staff officers was replaced by an experienced combat commander, General Francis Donovan. Shortly thereafter, the United States launched a military operation against Venezuelan leader Nicolas Maduro. Will this replacement also be a signal like the change of commander of the US Southern Command at the end of last year?