There was no official truce, yes soldiers were involved in unofficial cessations of fighting along parts of the Western Front, but there was no truce. In fact you may be surprised at the causality list for christmas day 1914 on the Commonwealth War Graves Commission, along the Western Front.

The fraternisation was not, however, without its risks; many soldiers were shot by opposing forces.In each of the following years of the war, artillery bombardments were ordered to start on Christmas Eve to ensure that there were no further lulls in the combat.

The incidents recalled by romantics in irrevocably mythologized songs and film were in fact nothing more than a 'blip'.

Romantics assert that the Truce was an effort by normal men to bring about an end to the slaughter. Well the causality lists for 1914 - 18 will answer that for you.