At one pole are peaceful initiatives, ranging from lulls in the action to friendly fraternization, as described briefly here and more extensively here, and illustrated in the photograph from The Illustrated London News (January 9, 1915): "British and German Soldiers Arm-in-Arm Exchanging Headgear: A Christmas Truce between Opposing Trenches", posted below.

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At the opposing pole are aggressive actions, typically timed specifically to coincide with a holiday celebrated by either the aggressors or their targets. Examples include: