saudi arabia has one of the highest percentages of military expenditure in the world, spending more than 10% of its gdp in its military. the saudi military consists of the royal saudi land forces, the royal saudi air force, the royal saudi navy, the royal saudi air defense, the saudi arabian national guard (sang, an independent military force), and paramilitary forces, totaling nearly 200,000 active-duty personnel. in 2005 the armed forces had the following personnel: the army, 75,000; the air force, 18,000; air defense, 16,000; the navy, 15,500 (including 3,000 marines); and the sang had 75,000 active soldiers and 25,000 tribal levies. in addition, there is an al mukhabarat al a'amah military intelligence service.