In place of the 10th Australian Light Horse Regiment, the only AIF light horse regiment recruited in WA during that war, was the 10th Light Horse Bunbury Troop, which made its way to Perth that morning to be part of the action.
From the beach, the Bunbury Troop marched to Memorial Hall Monument to celebrate the facility's 90th anniversary.
There they were met by more than 100 people.
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READ NOWMargaret Taylor, whose grandfather Duncan Farquhar Grant Bain was a member of the Light Horse Regiment, was asked to lay a wreath in honour of past and present Cockburn soldiers.
Sergeant Bain died in Gallipoli aged 29 but the memory of the Katanning local who arrived in Australia from Scotland in 1901 has not been forgotten.
"He was a kind man and, I've been told, a fine soldier," Ms Taylor said.
Two exhibitions detailing the 10th Light Horse Regiment and the history of the Memorial Hall were also set up.
n The Weekender wants to publish letters you have in your family written to and from the battlefields.
Write to weekender@communitynews.com.au.