CIA Factbook The World Factbook 1994: SpainDefense Forces Branches: Army, Navy, Air Force, Marines, Civil Guard, National Police, Coastal Civil Guard Manpower availability: males age 15-49 10,377,990; fit for military service 8,396,405; reach military age (20) annually 337,764 (1994 est.) Defense expenditures: exchange rate conversion—$5.8 billion, 1.3% of GDP (1994 est.)