Deploy is the first thing every player must make in the beginning of the battle. Each player starts with a certain number of units
that must be place in any of the 16 beggining squares (see picture below):

In the
Deploy there aren't any
Movement Points to spend and the
Movement type of each unit is not taken into account. You can insert all
the units whereaver you like and splitting them at your own will.
In the battle between 4 players the same rules of the battle between 2 players are applied. Also, the area you have for deploying you'r units
is the same (see picture below).

The Battle will only start when the players have deployed their units. Also, when you are deploying your units, you can't see the adversary(ies) deploying
theirs. The adversary(ies) units will only be visible when the battle starts.
In every battle, even in a 4 player battle, the maximum number of units you can have is 8. The only exception is a
Regicide battle where you will have 9 units.
The 9nth unit is the
Flag that is added automatically to your fleet.
Below is a video that teach you how to deploy your units: