I would agree with Carlos. If talking about matters such as the Conquest of Mexico ( 1519-21), I would say these fashions were good until circa 1540-50. However I think during the 16th century you see a gradual move from effectively "late Medieval" to "English Civil War" style clothing and equipment .For instance a late Elizabethan army would look quite different from that which fought at Flodden in 1513.