This post is about when you have a castle in any of the other kingdoms (Everwinter Glacier, Burning Sands, Fire Peaks, etc..) and you want to send units/tools/resources from The Great Empire (Where your main castle is located) to your other castles. 

 

First click the map of the kingdoms tab all the way to the left of the right bottom toolbar. It is a circle divided into three parts (Blue for Everwinter,Red for burning sands, white for the great empire)

 

It is located next to the "World map" tab which looks like Earth. Then find the kingdom you have a castle in (or want to start a castle in)  and you will see three buttons. One button in the center says Travel to this Kingdom (assuming you already have a castle there, if you dont you will see three options to buy one), this will bring you to your castle  in that kingdom. The button on the right of that is to send resources to that kingdom, It has a wood pile and a stone pile on it.

 

Note: you can send resources from any kingdom TO any kingdom by selecting the castle of origin in the top left. Sending resources will cost a percentage of the resources to send. The maximum you can send depends on the storage capacity in that castle.

 

The button on the left is for troops. Click it and you will see all your tools and troops there to send over to any of the kingdoms. NOTE: you can only send  to one kingdom at a time and the time is 2 hours which can be reduced to 0 with time skips. NOTE: there is a cost of coins for sending troops and tools.

 

Last thing. There is a research option (at your research tower) associated with the speed at which your troops will reach the other kingdoms. The higher the level of research in that option, the faster your troops will get there without time skips.