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100 years on

Today marks the 100th anniversary of the beginning of the Battle of Passchendaele.

Moving pictures of the Battle of Passchendaele on 100th anniversary

These haunting images show the brutal scenes that soldiers braved during the Battle of Passchendaele.

Today is the 100th anniversary of one of the bloodiest offensives of the First World War, which left more than half a million men dead or injured on both sides.

The Battle of Passchendaele saw more than 100 days of fighting in the summer and autumn of 1917, starting on July 31.

MORE: Ceremony to mark 100 years since Battle of Passchendaele
MORE: The Battle of Passchendaele explained

In just over three months of conflict there were more than half a million casualties – 325,000 Allied soldiers and 260,000 to 400,000 Germans – in the Belgian battlefields.

The towering Menin Gate in the Belgian town is covered with the names of 54,391 British dead who have no known grave, according to the Commonwealth War Graves Commission.