What major organizational change occurred in the Marine Corps in 1933?

The significant organizational change that took place in the Marine Corps in 1933 involved the reorganization into the Fleet Marine Force (FMF). This reorganization was driven by the recognition of the need for a more effective integration of Marine forces with naval operations, enhancing the capacity for amphibious warfare and combined operations with the Navy.

This restructuring aimed to create a more agile and responsive force capable of adapting to emerging threats and the changing dynamics of modern warfare. By formalizing the FMF, the Marine Corps established a dedicated command structure that allowed for better coordination and operational planning, ultimately leading to improved efficiency during missions.

The other options, while important in various contexts, do not specifically address the formal structural change instituted in 1933 that redefined the organization and deployment of Marine forces in conjunction with naval operations. Understanding this change is crucial for comprehending the historical evolution and strategic framework of the Marine Corps.