The merger of three Sharia Commercial Banks (Namely BUS) subsidiaries of State-Owned Enterprises (BUMN) to become the largest Sharia Commercial Bank in 2021 is the government's commitment to advancing Islamic finance as a new pillar of national economic strength. A critical analysis is carried out to obtain the merger action's meaning using internal and external geostrategic studies. The analysis shows that now is the right time to do the merger option. This merger has a strategic role in realizing Indonesia's vision as a center for Islamic finance in the world. Indonesian capital resources such as members of the G-20, integration of AEC 2020, demographic bonus, credit to GDP ratio in Indonesia, level of public literacy, government commitment, demographics of Islamic bank employees, shared vision of Islamic banking stakeholders, the success of SMEs in the financing, are the sources of capital to increase the Islamic financial ecosystem. The merged bank will have a strong base capital to expand and obtain longterm funding sources nationally and globally. The competitive advantage of participating banks will present various banking products and services that can compete with other national banks to boost economic development.