Sentence:  An aircraft with a load of small nuclear weapons could very conceivably be given a mission to suppress all trains operating within a specified geographic area of Russia - provided that we had <WSD>used</WSD> some of our ICBMs to degrade Russia 's air defenses before our bombers got there . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose