militarism
noun
[ ˈmɪlɪt(ə)rɪz(ə)m ]
• the belief that a country should maintain a strong military capability and be prepared to use it aggressively to defend or promote national interests.
• "the hostility and militarism of the regime has not ebbed in any perceptible manner"
Origin:
mid 19th century: from French militarisme, from militaire (see military).