Vice Admiral Arthur S. Carpender played a significant role in supporting the 9th Division during World War II, particularly in the Pacific theater. As the commander of Allied naval forces in the Southwest Pacific, Carpender was responsible for coordinating naval operations to support ground forces, including the 9th Division.

One of the key ways he compromised to aid the 9th Division was by ensuring that naval resources were allocated to provide necessary support for their operations. This included the use of naval vessels for transport, supply, and fire support, which were crucial for the success of ground operations in the challenging environments of the Pacific islands.

Carpender's leadership involved balancing the demands of various Allied operations and ensuring that the 9th Division had the naval support needed to achieve their objectives. This often required strategic compromises and prioritization of resources to meet the immediate needs of the ground forces while maintaining overall operational effectiveness in the region.

His efforts were part of a broader Allied strategy to coordinate land, sea, and air forces to achieve strategic goals in the Pacific, demonstrating the importance of inter-service cooperation and compromise in achieving military success.