As a history buff (which I imagine most of us here are), I've always been curious as to why certain weapons become dominant in one era, then lose their popularity as time goes on and technology changes. I always like to ask "why" that way I really understand it.
After studying Renaissance martial arts for about a year and a half, I think I am beginning to appreciate more the differences and relative strengths and weaknesses of these weapons. All of them were effective, but some were better suited to given historical environments.
Please let me know if I understand these transitions properly:
Sword and Shield: Fall of Rome to Late 1300s
Sword and Shield is dominant due to the inherent weaknesses of maille as armor. Since maille can only reduce the damage you sustain (rather than protect you completely), the additional defense of a shield is extremely helpful. The shield is also useful for deflecting or trapping enemy weapons. The sword and shield are used successfully together in combined offensive and defensive techniques. The sword in question would be an early arming sword optimized for cutting strokes against maille-clad enemies.
Longsword: 1250 to 1600
Longsword gains the advantage due to improvements in armor. With the advent of plate armor, shields lose much of their usefulness. Longswords have greater reach than arming swords, greater point control for stabbing into the gaps of plate armor, greater leverage, and greater firepower on average due to their length and the use of both hands. In the half-sword, the longsword sacrifices reach, but gains maximum leverage, point control, and thrusting power to deal with full plate armor.
Sidesword: 1500s and 1600s (late use: 1700s to 1900s)
With the rise of reliable firearms and the gradual loss of armor, the sidesword gains ascendance. Sideswords, as one-handed weapons, allow for use of pistols in the other hand or for use of other off-hand weapons (like the buckler, dagger, target, or cloak). Sideswords also have much longer reach than any previous one-handed sword - rivaling some longswords for reach. They also have greater hand protection (important since gauntlets are not worn as much since they interfere with gun use). Like the longsword, they have great point control and thrusting power useful for getting into the gaps of plate armor. But partial plate armor was increasingly common and the gaps in armor got larger and larger, so many of the advantages of the longsword (like half-swording: maximum point-control, leverage, and thrusting power) were no longer needed. Sideswords are also easier to use in tight infantry formations. Sideswords lack the leverage and firepower of longswords, but still became more popular due to reach, hand protection, and the ability to use off-hand weapons.
Saber: 1700s to 1900s (early use: 1600s)
With the practical disappearance of armor (basically only used for heavy cavalry and even then just a helmet and cuirass), armor penetration was no longer relevant. The thrust, which was so pivotal for finding and piercing the gaps of armor, became merely another way to kill. Cuts, long only useful against poor men who could not afford armor, became lethal. So the saber rose to dominance - similar to the sidesword in many ways, but curved, single-edged, and optimized for the cut. This was especially useful for cavalry to use, decapitating their enemies as they rode past. Sideswords (or very similar swords such as the broadsword, backsword, spadroon, and other straight cut-and-thrust swords) continued in use, though were less popular than sabers. This late use of sideswords was especially popular amongst heavy cavalry.
Please let me know if I have missed something or if I misunderstand something.
