The muster order is a combined conscript and invest order. This order commands one of your communities to build an army or leader and invest enough gold to counteract the gold production lost during the build. The community must be of the appropriate race, must be large enough to muster the unit and must have enough gold production. Your treasury must also have the required gold. The race, community size, and gold required for each unit you can muster are listed in your turn report. The muster will usually cost 5 gold more than the cost of the unit alone because of the investment to counter the gold production loss. You may issue orders to the new unit on the following turn.

Example: C100 MUSTER UT92
(Waterdeep [C100] musters a Human Militia [UT92])