If you like Barbarian Horseman You want Valley of the Five Fires

Levesl 4-9 it suggest AD&D1e and BX compatible

Lots of Hex Maps and starter dungeons inside.

Nex Spellcasters Classes and spell.

Lots of stuff to give the campaign the Horde approval.

video https://youtu.be/ytqJXFPuvLY

lulu print link https://www.lulu.com/shop/richard-leblanc/old-school-adventurestm-module-va1-valley-of-the-five-fires/paperback/product-1qnkwjyk.html?q=valley+of+the+five+fires&page