A detail of Soldiers from Saint George
by Pedro Nisart, Mallorca, Spain, c.1468-70

Click for the full painting.

Source: Miniaturas Militares by Alfons Cánovas
San Jorge (c. 1470), Museo Diocesano de Mallorca.

Spanish Infantry, 15th century, in Armies of the Middle Ages, volume 1 by Ian Heath, based on Saint George by Pedro Nisart
Other Spanish and North African resources
Other 15th Century Illustrations of Costume & Soldiers