"action of turning (something) to military use," 1881 (in italics in a 1871 translation from French), probably rendering French militarisation (by 1853); noun of action from militarize (q.v.).
Entries linking to militarization
militarize v.
"turn to military use, give a military aspect to" (transitive), 1829, see military + -ize. Related: Militarized; militarizing.