Age of Empires II: Definitive Edition (PC) - Achievement - Construction Cancellation
Destroy the Rashtrakuta Wonder before it is completed in "Liberation?".
The final objective will to be destroy the wonder, so by destroying it before it is completed, the mission and achievement will complete.
You cannot train additional Villagers or build a Town Centre. You can build Fishing Ships for additional food, but will need a small navy to defend from fairly persistent sea-pushes initially. Once you have destroyed the first 3 Castles, you will no longer have need of a navy. At this point, the Wonder will begin being constructed.
You will have quite a lot of time to get to the wonder, so you shouldn't have to rush. As long as you keep targeting the enemy Castles, you will take control of the remaining buildings in the area, so you can keep producing units at the frontline. You will get a Castle at the frontline around the time the enemy starts constructing the Wonder, so you won't have to send Trebuchets all the way from your starting base.