Age of Empires II: Definitive Edition (PC) - Achievement - Roar Like a Lion

Win the fifth Sundjata mission "The Lion's Den" on Hard difficulty.

Some missions can be pretty challenging for your average gamer on hard mode, but this ones not actually that bad. It's important to make a choke-point early on outside the enemy base - build walls and a castle(s) when you get to a narrow passageway where you can see the enemy has a tunnel of walls on either side (You get here by following the land North-West from your main base and then South-West). This stops them from expanding early on and taking the gold / stone that's on the land between you and them. On a side note, there are also gold and stone stockpiles on a few islands around the map.
I found it best to attack via land and sea. Set up your land choke-point, then build a University and research Chemistry so you can get Cannon Galleons to bombard any enemy structures you can and clear out the enemy buildings on the islands containing gold and stone. Build a few Fast Fire Ships to go with them to protect them from enemy Galleons.
Once you've dominated the sea, go back to pushing your land attack. I found it best to combine Trebuchets with Elite Gbeto Warriors for protection. It can be a bit tedious getting in to the enemy camp as it's protected by two layers of walls with Trebuchets and Onagers inside the wall as well as towers, but you should have enough villagers on resources at this point to pump units out and overwhelm them.
It's likely that the enemy will also start constructing a Wonder at some point - Make sure you are doing everything as fast as you can to stop the enemy achieving a Wonder Victory and you should be fine.