dave,
The powers that be are trying their best to make sure young people never even know about it, let alone forget.

"The Department for Education and the Department for Communities and Local Government are also jointly funding a project which will provide the opportunity for two pupils and one teacher from every state funded secondary school in England to participate in battlefield tours of the western front from spring 2014 to March 2019. This will be a high quality educational project which will strengthen participants' knowledge and understanding of the First World War as well as giving them the opportunity to develop related projects in their communities. "

WW1 is included in the Secondary Schools History curriculum, and can also be taught in Primary Schools.

Poppies and Remembrance have traditionally been about acknowledging the sacrifices of WW1 and WW2.
What are the lessons "we (or our leaders) are incapable of actually learning?" about those conflicts?