Under President Roosevelt's leadership, the JCS steadily grew in influence and became the primary agent in coordinating and giving strategic direction to the Army and Navy. In combination with the British Chiefs of Staff, it mapped and issued broad st rategic direction for both nations. | Under President Roosevelt's leadership, the JCS steadily grew in influence and became the primary agent in coordinating and giving strategic direction to the Army and Navy. In combination with the British Chiefs of Staff, it mapped and issued broad st rategic direction for both nations. |