The relationship of state economic strength with national defense demand has been of a major concern to practitioners and academicians. To address this issue, a long-term average point of view is taken in this study. Using a sample of 166 countries and ten-year investigation period spanning from 1991 to 2000, our results demonstrate that 'Income Per Capita' is positively associated with 'Defense Expenditure Per Civilian,' indicating that countries with stronger economic strength have more demand for national defense security. We reexamine this issue by dividing the ten-year investigation period into two five-year periods; the results show that the relationship of the two variables remains stable across the two time windows. In addition, we further examine the relationship by using alternative proxy variables for extent of national defense demand as follows: total defense budget, defense budget per militant, ratio of militants in high-tech military services. All the sensitivity tests lend support to the above findings.