ἐκστρατεύω

Etymology
from

Verb

 * 1)  to march out; go off on an expedition, depart for a campaign
 * 2)  to organize and launch an expedition or campaign
 * 3)  to march out (an individual or band of men); order (a soldier or an army) to start marching
 * 4)  to recruit for and wage a campaign; plan and execute an operation (as part of a battle or war)
 * 5)  to conclude a campaign
 * 6)  to take the field (for combat operations)
 * 7)  to be in the field (said of a general or his troops on a battlefield)
 * 8)  to be engaged in active service; be employed on active duty
 * 9)  to have ended a campaign; be a veteran of a completed expedition
 * 10)  a veteran (who experienced a campaign or expedition to its conclusion)