 Complete the following phrase:  The Swiss won a series of spectacular victories throughout Europe, helping to bring down the feudal order over the time, including victories at Morgarten, Laupen, Sempach, and Grandson. In some engagements the Swiss phalanx included crossbowmen, giving the formation a missile stand-off capability. Such was their effectiveness, that between 1450 and 1550 every leading prince in Europe either hired Swiss pikemen or emulated their tactics and weapons such as the German Landsknecht. Even the Swiss, however, were not invincible; they could be beaten when confronted with a foe with absolute superiority in numbers, weaponry and armour as almost happened at Arbedo in 1422, and at St Jakob in 1444 and the advent of firearms and field fortifications made the Swiss frontal steamroller attack extremely risky as shown by the battles of Cerignola and 