planeerimata lahingutegevus ootamatul ajal ja/või ootamatus kohas
a combat action that occurs when a moving force, incompletely deployed for battle, engages an enemy at an unexpected time and place
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Generally, it occurs when two opposing forces meet in unexpectedly while conducting another tactical activity. The common conditions for meeting engagement are that neither force is prepared for defence; both are moving; and there is an element of surprise on both sides.