Soil from Flanders war cemeteries taken to Wellington Barracks

The video discusses a journey that began nearly a century ago, focusing on a casket filled with earth from Flanders' graves, symbolizing the future's debt to the past. The Belgian Navy transported sacred soil, once soaked with the blood of World War I sacrifices, from Belgium's battlefields. With the passing of all World War I veterans, the video emphasizes the importance of keeping their memories alive, such as through the creation of a commemorative garden.

Why is it important to keep the memories of those who fought in the First World War alive?

What does the garden mentioned in the text symbolize?