One hundred years ago today, the world was plunged into a conflict the likes of which had never been seen. Thankfully, we've not seen anything like it since either.
Millions of people lost their lives in the First World War. Families and communities were torn part. Geo-political borders were redrawn and alliances were formed that still stand the test of time. The world, literally, changed forever.
All over the world, there are events marking the start of the conflict, but a longer lasting idea has come from the Woodland Trust.
At woodlandtrust.org.uk they're encouraging people to dedicate a tree to those that lost their lives in the Great War. You can search for a woodland near you, or near a family member who perhaps gave the ultimate sacrifice. There are woodland sites all over the country where you can pay tribute in a way that will really last.
We think this is a great idea from the UK's leading conservation charity.