Which type of rounds can mortars fire that are not typical for artillery?

Mortars have the unique capability to fire red phosphorus rounds, which are not typically associated with standard artillery configurations. Red phosphorus rounds serve a specific purpose in various military operations, particularly as marking or signaling devices and for screening operations.

While high explosive, illumination, and smoke rounds are also utilized by both mortars and artillery, the inclusion of red phosphorus rounds is more distinctive to mortars due to their design and use in tactical scenarios such as marking targets for airstrikes or creating visual signals in battlefield conditions. The portability and versatility of mortars make them advantageous for firing these specialized rounds effectively in combat situations.