Age of Empires II: Definitive Edition

Age of Empires II: Definitive Edition (PC) - Achievement - Friends, Countrymen, Lend Me Your Ears

Convert Afonso de Albuquerque without killing a single Portuguese unit in the fifth Francisco de Almeida mission "A Son's Blood".

You start without a Town Centre on this mission, so you can't build up your economy early on. You also start with two Monks and a Missionary. Get some of your Villagers mining gold and build a few monks to assist the ones you already have.
Once you have converted 10 of Afonso's Armada (Red) men, you will be able to convert Afonso de Albuquerque which is basically the end point of the achievement. However, what you are not able to do until then is kill ANY of the Red army. You can take casualties yourself - that's fine. Just do not kill any of his men. You'll need to micro your Monks as best you can and bear in mind that as you don't have a Town Centre, you can't advance to the next age and research Theocracy, meaning that if you convert a unit with a group of Monks, they will all have to regenerate their faith.
Once you have managed to convert 10 men, you should be able to lure Afonso de Albuquerque out of his camp by approaching from the North-West side, by the coast and attempting to convert him from outside the wall. You will take fire from a tower, but as long as you have enough Monks, you will be fine.

You start this mission with two Monks and one Missionary (a monk on a donkey) and need to convert enemy units to progress.

First, send one villager to the river north-west of your base and build a dock and a transport ship. Then work on the objective. An update has removed the ability to do this.

Before you can convert Afonso, you need to convert any 10 enemy Portuguese soldiers. All enemy units outside the enemy walls are in pairs, but some patrol so keep that in mind. Use the Missionary to pull each pair of units, then run back to your monks. Convert one with the Missionary and the other with the Monk pair. You should be able to easily convert both units before any of your units die.

Save between every pair of units converted and remember to let your faith regenerate to 100% before going for the next pair. Send all converted units back to your base.

Once you have converted 10 units, you'll get the objective to convert Afonso. The best way to do this is to load both your Monks and your Missionary onto a transport ship, then send it to unload them on the coast next to Afonso. Tell all three to convert him and it won't take long at all. After he's converted, you are given the enemy base and the achievement.

Again, an update has made this strategy impossible. You'll need to sneak round the side of the base and lure Afonso out while converting any Portuguese soldiers that try to kill you (or just luring anything that isn't Afonso away from the base)