chainmail and long sword on wooden panel

A longsword is characterized by being a straight double-edged sword with a cross-shaped hilt (called a cruciform), with a longer handle for two handed use. These were considerably longer and heavier swords compared to the arming swords of the era, which were short and light, used more as sidearms than as a primary weapon.

The longsword was developed in the 14th century, in the early phases of the hundred years war. The swords were used primarily by Knights in full plate armor on foot or on horseback throughout the late medieval period.

See also:

Arming sword