[Solved] Campaign custom units/assests

[Standhaft]

I am making a campaign which I want to have some custom units and things. For example, Blood Elf Lieutenant, new mage and dwarf heroes, etc.

Do I need to do all the custom work for every single individual map or is there a way I can save the information to the campaign itself so that any map I make in the campaign will already have access to those custom units and stuff?

Edit: I believe I found it. I have to go to Custom Data under the Campaign Editor itself. If I create the custom units there, then I can use them in any map in the campaign.