Weaponry
Ballistic weapons:
-Crossbows (properly called 'arbalests') are standard-issue for knights and the occasional infantryman with the money. You can't use them on Christians, but on the barbarians? Why not? Crossbows are essentially small bows mounted on a stock which you crank back, to fire a bolt (the technical name of the short crossbow 'arrow') with great speed and accuracy. Unfortunately, because it takes time to crank the crossbow, longbows are still more efficient, if difficult to use in close combat. Crossbows are also favored amongst lawbreakers throughout Thiasa--and some law
makers. Here a picture of a crossbow:
-Trebuchets and mangonels are handy for tossing flaming balls of Greek Fire onto the enemy, but very difficult to transport over the hilly Thiasan terrain, or any of the varied landscape on barbarian lands. Catapults are used to throw spears or other heavy bolts. Here's a picture of a trebuchet:
-Cannons are always nice, though it's rather hard to travel with them, and the horses have to be trained not to spook at the noise. On the upside, the barbarian horses are more likely to spook, though the keen barbarian horsemen often don't allow it to throw them into disarray.
Here, a 1326 illustration of a cannon firing a large arrow:
-Matchlock, or Handgonne: a recently invented Scalian weapon, it consists of an 8-to-16-inch tube ignited by a complex trigger system, first invented in Duain. Many don't trust this new weapon, and its accuracy isn't as good as that of a crossbow, but it may catch on...
Here's an illustration of real-world 15th century soldiers firing matchlocks:
-Longbows, quick to reload, may be used to send a hail of arrows raining down onto the enemy.
-The shorter, stronger recurved bow is a knight's weapon, though most use crossbows.
Edged Weapons:
-The longsword is the basic weapon for any knight. The sort used in Thiasa has a wide, double-edged blade and a cross-shaped hilt; it's about 4-4 1/2 feet long and weighs about 3-4 lbs. It's often wielded two-handed, meant to cleave enemies in two, or behead them from horseback. Originally designed to combat the thick armor of the Scalian forces, it's a bit more than is strictly necessary against the ill-armored Baskar, and some enterprising knights have taken to using lighter swords, instead. Here's a picture of a longsword:

-The sidesword resembles a longsword, but tapered, with a wide wrapped hilt (that is, round coils of metal placed around the hilt) to protect the hand. It is about four feet long. It's most often used by infantryman who want to fight the barbarians directly, in close quarters; it's very efficient at ripping through the bronze of their shields. The Thiasan sidesword is wielded one-handed, and permits the simultaneous use of a shield, so it's a very handy infantryman's weapon, provided he can afford it.
-The dagger: every knight and infantryman would have at least one. The dagger is basically a long knife with both pommel and guard, very like a sword, though the dagger may be double- or single-edged. Daggers range in blade length from 6 to 18 inches.
-The throwing-dagger is not a reliable weapon of war, but it has become a bit of a cult weapon amongst Thiasan commoners. They use daggers instead of darts in inns, etc. It does, however, take a great deal of skill to master, and it's hard to aim, as it needs to fly end-over-end to its target.
-The axe: not many Thiasans carry these, as they're the weapons of the barbarians (who frankly know how to use them better), but some knights and infantrymen make use of them when they're on the ground; it's an efficient way to quickly cut down enemies. The huge Thiasan axes are wielded two-handed and have a double blade.
Polearms:
-Spear: the basic long-handed thrusting tool, with a tip like a broad arrow; sometimes infantrymen take basic spears and modify them, including a glaive-like scythe blade. The plain spear isn't standard-issue, but many prefer it, as it's lighter and shorter than most other polearms. Some spears, like the angon, are specifically designed to be thrown rather than used as stabbing tools.
-Traditionally, the pike is the infantry's main weapon. It is incredibly long, and thus best used in formation. Since the guerrilla tactics of the barbarians often fragment formations, the pike is increasingly being abandoned in favor of the hache. Here's a picture of a pike:
-Hache (also known as 'Pollaxe/Polaxe'): a five-to-seven-foot-long pole with a hammerhead or a curved spike on the butt and a rather serious business end: an axe-shaped blade at the tip, surrounded by spikes. Almost all infantrymen are trained to use the hache now. Here's a picture of one variety of hache, this one with a spike at the end:

Blunt Weapons:
-Mace: picture a spike-topped steel ball on a short, thick steel pole. That's a mace; it's very effective against armor, and can destroy barbarian shields and axes. Some knights use maces, but only very few infantrymen.
-Flail: two or three spiked balls attached to a pole. This descendent of the agricultural flail has little in common with its benign cousin. It takes a lot of skill to wield a flail properly, and it's not the ideal weapon against the barbarians (like many, it's suited best to armored combat) so it's not a common weapon. Most flails have two balls; here's a picture of one with three:
Armor:
-Aketon: the quilted fabric worn underneath armor.
-Arming cap: worn beneath the helmet.
-Armet: a light helmet with hinged cheek-pieces, a relatively new invention. The armet is worn by knights only.
-Bascinet: this open-faced helmet is part of the infantryman's uniform. It doesn't protect the face or eyes, but it doesn't generally need to; in formation, they're massed very close together, a natural defense against arrow attacks.
-The cuirass, or platemail, is comprised of a breastplate, backplate, and sometimes, tassets (plates covering the hip and thigh). Only knights wear platemail, which allows for a little less freedom of movement and (more importantly) is too expensive for infantrymen. A full suit of armor, including the pauldron (shoulder armor), poleyn (plate for the knee), couter (for the elbows), rerebrace (for the upper arm), gauntlet (for the forearm and hand), cuisse (for the thighs), greaves (for the lower leg), and the sabaton (for the foot) would weigh about 60 lbs, and allowed for very free movement; plate mail is also impervious to many weapons. The only issue, of course, is the care it takes to maintain, the expense... and, in a climate like that of Thiasa--the heat.
-Mail: the armor of choice for infantrymen, mail is made up of up to 20,000 tiny rings. Mail is flexible and comfortable, and it'll protect against lighter blows (particularly as the barbarians use chiefly bronze weapons), but it is no good against very forceful blows or steel weapons, unless worn with a great deal of padding beneath (this is highly inconvenient in Thiasa's climate). Fun fact: never refer to mail as 'chain mail'; that name only became popular in the real-life 1900s.
-Jack: a cheap defensive coat of fabric or leather, worn by some of the poorer infantrymen, with small plates stitched between its layers.
-Infantry shields are tall and oblong, with a pointed bottom and a convex, and are often used to create interlocked patterns to deflect arrows or push forward against the enemy. This technique, however, works less well against the guerilla tactics of the barbarians, and some infantry platoons have taken to using the smaller, round shield known as the 'target.'
-Knights also use the small, round target as their shield. It may be set on the arm so that a sword can be wielded two-handed, and often act as its own weapon, used to bludgeon the enemy.
SOURCES:
http://www.sfusd.k12.ca.us/schwww/sch618/War/War.html
http://www.historicalweapons.com/swordsanddaggersterm.html