Why was the spatha replace the gladius?
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The spatha apparently replaced the gladius in the front ranks, giving the infantry more reach when thrusting. While the infantry version had a long point, versions carried by the cavalry had a rounded tip that prevented accidental stabbing of the cavalryman’s own foot or horse.
Is a spatha a gladius?

The short answer is that the gladius was a short sword (about a foot and a half to two feet long in blade length) that was designed primarily for thrusting in very close range behind a shield while the spatha was a longer sword (about three feet long in blade length), originally a cavalry sword, that was designed …
Why did Romans stop using the gladius?
The Romans shortened the gladius based on their experience in the Roman civil wars of the Late Republic. Because Romans fought each other during this period, the traditional Roman military superiority had lost its advantage.
Why did Romans switch to spatha?
Gladius was abandoned by the 3rd century in favour of longer slashing sword, spatha. Initially used by cavalry, spatha provided more reach and better thrust capabilities.

Did Spartans use Spathas?
This sword was used by the officers (lochagoi) and leaders of the famous Spartan infantry for close combat at battles like Thermopylae and Plataies. Its sharp blade is made of high carbon steel.
How much does a spatha weight?
between 500 and 700 grams
Most original blades of this type tend to weigh between 500 and 700 grams, unmounted. Their length is not too different from some swords of the early Imperial period, but have grown broader and more massive and show greater variation in cross section.
What is the difference between gladius and semi-spatha?
Pompeii gladius is the shorter gladius sword and it has parallel cutting edges. However, the length increased gradually of the sword and it is now well known as semi-spatha as well. Spatha is another Roman sword, but a longer one compared to Gladius.
What happened to the gladius and the spatha?
The gladius had essentially disappeared by the end of the Roman Empire, but the spatha actually outlived Rome itself. This long sword was adopted back into the cultures of post-Roman Europe and inspired several notable medieval weapons.
Is spatha a strong sword?
However, Spatha is a single-handed sword. Spatha is also a lightweight sword, which is easy enough to handle single-handedly. The weight of this Roman sword ranges from 1.1 to 1.6 pounds or 0.5 to 0.7 kg. In cavalry charges, Spatha is easy to hold for the lighter weight. So the blade of Spatha was strong but lightweight at the same time.
How long is the blade of a gladius?
About 10 inches. A gladius could have a blade 18 to 27 inches long, depending on the style. A spatha’s blade ran between 30 and 39 inches. Originally the spatha was used by the calvary who needed a longer sword to reach enemy on the ground. Later it was adopted by the infantry as tactics changed.