Who took part in the battle of messines?

The Battle of Messines, fought from June 7 to June 14, 1917, during World War I, involved British forces, primarily the British Expeditionary Force, against the German Army. The battle was notable for its extensive use of tunneling and mines by the Allies, resulting in a significant explosion that marked the offensive's start. Key units included the Australian and New Zealand Army Corps, alongside British divisions. The battle aimed to capture the Messines Ridge and was part of the larger strategy to weaken German defenses prior to the Passchendaele offensive.