In the modern world today, countries would have a defence force to deter opposing threats and to help other countries with operations, such as peacekeeping and humanitarian aid, which enables the country to be fullspectrum capable. In this essay, the author defines what full-spectrum capability is with reference to Singapore, which is inclusive of conventional warfighting skills, participation in Operations Other than War and the security of Singapore’s land. The author also explains the need for the Singapore Armed Forces (SAF) to have full-spectrum capability and he points out the challenges that the SAF may face in sustaining a full-spectrum capability posture for the different operations, for example, limited manpower and resources.