On the topic of moose domestication, Valerius Geist's
Deer of the World claims that Swedes in late middle ages had used moose to pull light sleds, that King Charles XI attempted to create moose cavalry but failed and that Siberian tribes commonly used moose as steeds until the conquest of the region by Yermak Timofeyevich on the orders of Ivan the Terrible. Sadly, the only citations for these claims that I found (via internet search) is this one book and, coupled with the reported difficulties encountered by the
Soviet moose domestication projects, make me doubt the validity of Geist's statements.