For the curiosity of people who do not have WM Medieval Armies and are interested in more info about the special of some troops, combined arms. Only 9 of 30 list in the book have the special, and 8 of them are for XV century.
The list and units that have combined arms are:
# Almoravid Moors list (XI century) spearmen and bowmen
Then jump some centuries to
# English army of the hundred years wars , XV century Men at arms, longbowmen, billmen
French of hundred years wars do not have combined arms
#The polish lithuanian union XV century, only kingdom of Poland have combined arms, Militia crossbowmen, militia spearmen
#Teutonic order XV century, Ordensdiern spearmen and ordensdiener crossbowmen
# Burgundian ordenance, XV century, longbowmen and pikemen
# War of the roses, The house of Lancaster XV century, Men at arms on foot, retinue bill and shire longbow
# War of the roses, the house of York XV century, Shire longbow, shire bill, retinue longbow, retinue bill
# The army of yorkist pretender XV century, logbowmen and bill
# The army of the house of tudor XV century longbowmen, bill, shire longbowmen and shire bill