What wars known as the Baltic Crusades involved the Lithuanians using the Žemaitukas prominently?
Žemaitukas:  Known from the 6–7th centuries, it was used as a war horse by the Lithuanians during the Northern Crusades and is hailed in Lithuania as part of the state's historic heritage. Northern Crusades: The Northern Crusades or Baltic Crusades were religious wars undertaken by Catholic Christian military orders and kingdoms, primarily against the pagan Baltic, Finnic and Western Slavic peoples around the southern and eastern shores of the Baltic Sea, and to a lesser extent also against Orthodox Christian Slavs (East Slavs).
Northern Crusades