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This article is about the technology in Age of Empires II. For the technology in Age of Empires IV, see Siege Engineering.

Siege Engineers is a technology in Age of Empires II that can be researched at the University once the Imperial Age is reached. Once researched, it increases the attack of most siege units (including Ballista Elephants) against buildings by 20%, and that of Petards by 40%. It also increases the range of all such ranged units by 1.

Some civilizations have either bonuses or unique technologies that increase the range of a type of siege unit; Koreans have Shinkichon, which increases the range of Onagers by 1, and access to Siege Engineers; as a result, they have the Onagers with the longest range at 10. The Khmer team bonus gives +1 range for Scorpions, and they have access to Siege Engineers; as a result, they and their teammates (with Siege Engineers) have the Scorpions with the longest range at 9. Tatars have Timurid Siegecraft, which increases the range of Trebuchets by 2, and access to Siege Engineers; as a result, they have the Trebuchets with the longest range and the unit with the longest range in the game at 19; and despite lacking Siege Engineers, Turk Bombard Cannons have the longest range at 14, thanks to Artillery which gives +2 range.

Despite lacking Siege Engineers, Burgundian Bombard Cannons deal more damage than other Bombard Cannons with Siege Engineers (outside of the Houfnice), since the Burgundian civilization bonus granting +25% attack to gunpowder units applies to all attacks (not just attack vs buildings).

The Armored Elephant line and Siege Towers are the only siege units to not be affected in any way by Siege Engineers.

Technology availability[]

Available Unavailable

Civilization bonuses[]

  • Portuguese: Siege Engineers is researched 30% faster.

Team bonuses[]

  • A team containing Malians: Researching Siege Engineers is 80% faster.


The Forgotten[]

  • Magyars: Cannot research Siege Engineers.

Rise of the Rajas[]

Definitive Edition[]

Dawn of the Dukes[]

  • Poles: Upon release, cannot research Siege Engineers. With update 56005, Siege Engineers was added to their technology tree.


Men who specialized in designing, building, and operating siege weapons were called siege engineers. These weapons were marvels of their age and complicated to operate. Hitting a narrow stone wall from a distance with a plunging stone shot was a difficult problem. Kings prized men who could solve it.