Defense ministers of the Gulf Cooperation Council (GCC) states decided Tuesday to complete studies for the formation of a unified military base, the Saudi News Agency reported. The ministers also decided to reinforce the six GCC countries\' defense integration through the development of the Peninsula Shield Forces, a GCC statement was quoted as saying. The Peninsula Shield Force, the Gulf nations\' joint military force, entered Bahrain through the King Fahad Causeway to quell the protests in the country last year.