Torsion Engines

Torsion Engines is a technology unique to the Ethiopians that can be researched at the Castle in the Imperial Age in Age of Empires II: The African Kingdoms.

This technology increases the blast radius of Ethiopian Mangonels, Scorpions and Bombard Cannons.

Strategy
Torsion Engines is a very helpful upgrade that benefits three out of the five available siege machines the player can build. The Mangonel line arguably gains the most out of this technology due to the expanded blast radius remedies the unit's inherent lack of precision and making missed shots slightly more forgiving; Attack Ground commands become more effective as more enemy units will be caught in the blasts, allowing tactical players to wipe out a large contingent of cavalry, tightly bunched infantry or even multiple siege machines in a single volley.