Unable to complete Military Mastery 'Produce 20 units from your keeps' using Deli Sultans

Age of Empires IV IV - Discussion
1

So I read up that keeps can be a landmark but I do not know what keeps or buildings are supposed to make units for the Deli Sultans. I upgraded to Castle cage with the Palace that produces War Elephants and i let it produce 20 of them but I did not unlock the mastery item.

Anyone shed some light on this? Thanks for any info…

2

Train scouts or Vils from their castles not their landmarks

It requires a unique tech before you can train those unit’s though

3

I figured it out finally…