In the hierarchical structure of the army, regiment commander, company commander, platoon commander, and battalion commander are the four key positions, and they are sorted according to their rank from high to low: regiment commander, battalion commander, company commander, and platoon commander. These positions play an important role in the military, and each has its specific powers and responsibilities. 
The regimental commander is the supreme commander in the army and is responsible for directing the combat operations of the entire unit. As the commander-in-chief of the army, the regiment commander needs to have excellent leadership skills and strategic vision, and be able to make the right decisions according to the battlefield situation to ensure the victory of the troops. 
The battalion commander is the right-hand man of the regiment commander and is responsible for directing the combat operations of a battalion. Battalion commanders need to have rich combat experience and organizational skills, and be able to effectively organize and command their subordinate units and complete various combat tasks. 
The company commander is a subordinate of the battalion commander and is responsible for directing the combat operations of a company. Company commanders need to have solid military literacy and command ability, and be able to flexibly adjust tactics according to the battlefield situation to ensure the effective operation of their subordinate units. 
A platoon commander is a subordinate of a company commander and is responsible for directing a platoon's combat operations. Platoon commanders need to have strict organizational discipline and command ability, and be able to effectively organize and command their soldiers to complete various tasks. 
In the military, the rank of position is very important, it determines the powers and responsibilities of the commander. When fighting, the subordinate commander must obey the orders of the superior commander, otherwise it may affect the outcome of the entire battle. In addition, the division of regiments, battalions, companies, and platoons is also determined according to the number of personnel and combat missions. In general, regimental-level units have a larger number of personnel and have relatively heavy combat missions, while platoon-level units have a smaller number of personnel and have relatively light combat missions. 
In short, the order of regiment commanders, company commanders, platoon commanders, and battalion commanders is determined according to the rank of their positions and the number of personnel, which ensures the effective command and operational efficiency of the army. Each post has its own specific powers and responsibilities, and only when each post cooperates with each other can we ensure the efficient operation and victory of the armed forces.