A frosty east-west relationship led to a sort of brinkmanship where both NATO and Russia flew military aircraft close to the other side's frontiers or even deliberately made brief incursions into the other side's airspace, either to test air defence capabilities or as part of a pattern of intimidation or coercion.
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The colony was not adequately supported and quickly fell prey to armed incursions, ending the empire's colonial endeavors in that region.
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Anglais example sentences with "incursions"