pique

Old French pique derived from piquer (to prick or pierce), from a Germanic root meaning to poke or point. The pike was simply a very long spear — its length (between 4 and 6 meters, or 13–20 feet) was its primary feature. When infantry held pikes in a dense formation (a pike square or pike block), they created a hedge of points impassable to cavalry. The horse and its rider, approaching the pike square, had nowhere to go.

Swiss mercenaries developed pike tactics to their highest effectiveness in the 15th and early 16th centuries. At the Battle of Grandson (1476) and Murten (1476), Swiss pikemen defeated the Burgundian cavalry of Charles the Bold — one of the most powerful armies in Europe. The Swiss reputation spread across Europe; every major power hired Swiss pike mercenaries. The Swiss Guards of the Vatican — still in service — descend from this tradition.

The combination of pike and musket dominated European battlefields from roughly 1530 to 1680. Musketeers needed protection from cavalry during the long reloading process; pikemen provided it. The standard infantry formation (tercio in Spain, later adopted everywhere) mixed pike and musket in specific ratios. When the socket bayonet allowed musketeers to fix a blade to their guns in the 1690s, the separate pike became redundant.

The pike survived in naval warfare as a boarding weapon and in ceremonial military use. Yeomen of the Guard at the Tower of London still carry ceremonial pikes called partisans. The weapon that stopped cavalry for three centuries now guards a medieval fortress as pageant.