The term "war sword" is a broad and generic term that refers to swords used in warfare throughout history. A war sword can encompass a range of different sword types, designs, and styles that were specifically crafted for combat and military applications.

The characteristics of a war sword can vary depending on the historical period and cultural context. Some common features of war swords may include:

1. Length and Blade Design: War swords typically have blades that are optimized for combat. They can vary in length, from short swords like the gladius or arming sword to longer swords like the longsword or katana. Blade designs can also differ, with straight, curved, or double-edged blades depending on the culture and time period.
2. Handling and Balance: War swords are often designed to strike a balance between weight, maneuverability, and cutting power. The specific handling characteristics can vary, such as a two-handed grip for increased control and power or a one-handed grip for versatility and quick strikes.
3. Durability and Construction: War swords are built to withstand the rigors of combat. They are typically constructed using strong and resilient materials, such as high-quality steel, and often undergo specific heat treatment and forging techniques to enhance their strength, flexibility, and edge retention.
4. Protective Elements: Some war swords may have additional features for protection, such as handguards or crossguards to shield the wielder's hand from enemy attacks. These protective elements can vary in shape and design depending on the sword's origin and purpose.

Examples of war swords from different cultures and time periods include the European longsword, Roman gladius, Japanese katana, Chinese dao, Scottish claymore, and many others.

It's important to note that the term "war sword" is a general description and not a specific sword type. The specific swords used in warfare varied significantly across cultures, historical periods, and the specific needs of the combatants.