Because it is important for students to develop an understanding of multiple academic disciplines, you may pursue a minor in addition to your major. For example, a military history major might select an intelligence studies minor. The combination of the major and the unrelated minor will enable you to expand your thinking beyond the single discipline, and allow you to present a broader academic portfolio to potential employers or graduate schools.
You may not minor in a discipline directly related to your major discipline. You may be able to fulfill the majority of the course requirements for a minor by carefully selecting and aligning your electives within your degree program, and you may apply transfer credit towards courses that count towards the minor.