Civic education is a form of the citizen's social contract with the state, as well as binding the minds, feelings, and bodies of citizens to the state. The state provides protection for citizens, and citizens give the loyalty to the state by carrying out the values of national defense character. However, in practice, the learning model used in civic education has not been fully holistic in developing student's national defense character. The purpose of this article is to examine the effect of using Project Citizen Digital on the national defense character of students in Civic Education. This the new research is because previous research developed Project Citizen Digital for civic literacy. The approach used in this research is quantitative to measure the Implement and Evaluate stages of using the ADDIE model (Analyze, Design, Develop, Implement, and Evaluate) after the development of the Project Citizen Digital Application. Data collection techniques used questionnaires. Meanwhile, the data analysis used one group pretest-posttest on 80 students from the Universitas Pendidikan Indonesia due to the limited ability of the Project Citizen Digital Application. The results of the research show that there are differences in student's character of national defense before and after the implementation of the Project Citizen Digital with an average difference of 2.95 percent.