How to complete the quest?

Perhaps an event quest, temporary.

There are now constant explosions in some areas at the listed locations. If you are in the firing zone, then if a projectile hits near you, you will be stunned. If you are hit, you will be 100% dead. Death is considered independent, there will be 1 hp in each part of the body

Go to the specified location and follow the sounds of explosions. If you enter the firing zone, the completed task goal will be displayed at the bottom right of the screen.

One of the necessary places is on Reserve on Horse houses

Find a place on the map