Q 260: How fast should an army move overland? According to the overland movement table, a party of Dwarves on foot should be able to cover 16 miles in an 8-hour day. But when you've got an army, there are logistical issues that slow them down. In the Red Hand of Doom adventure, the Goblin Horde takes 28 days to travel 100 miles on a highway (even taking out the 3 days they battle to take over towns... 25 days to go 100 miles...) that's a bit on the ridiculous side. Sadly Heroes of Battle has nothing on the subject.
So, you think an army of Dwarves could pull off 12 miles in a day, day after day?
Q 261: Flying creatures can't fly if they are encumbered to a medium load or more, but can they still using medium or heavy armors?