With Nando I did a lot of ground work...
...and introduced him to different situations. Be it playing ball, tarpaulin, umbrellas etc..
This should give the horse self-confidence and trust in its human partner so that it is prepared for everyday life.
Because today the horse encounters things in the forest or even at tournaments that they would normally have to flee from.
This training teaches them to apporach unknown thins and not to run away from them.