Siege Works (Age of Empires IV)

This article is about the technology in Age of Empires IV. For the building in Age of Mythology, see Siege Works (Age of Mythology).

Siege Works
Availability
Introduced in	Age of Empires IV
Civilization	All civilizations
Age	Imperial Age
Research
Researched at	University* Madrasa* Blacksmith* (Mongols) Istanbul Observatory Hisar Academy College of Artillery
Wood	300
Gold	600
Research time	90 seconds
Effect
Siege engines' hit points +20%

Siege Works is a technology in Age of Empires IV that can be researched at the University* in the Imperial Age. Once researched, it increases the hit points of siege engines by 20%.

Civilization bonuses

• Abbasid Dynasty: Research speeds are +15%/+20% faster while Golden Age tiers 2/3 are active. If Preservation of Knowledge has been researched, this technology costs -20%.
• Ayyubids: Research speeds are 25% faster while Golden Age tier 2 is active
• Byzantines: Research speeds are 30% faster per water level at buildings within the influence of a Cistern with the Dialecticus ability active.
• Chinese and Zhu Xi's Legacy: The technology researches 150% faster when the University is supervised by an Imperial Official. For Zhu Xi's Legacy, this can be improved to 300% faster after researching Regional Inspection.
• Delhi Sultanate: The technology is free, but takes 12x as long to research (1,080 seconds instead of 90 seconds).
• French and Jeanne d'Arc: The technology researches 50% faster from the College of Artillery
• Malians: Technologies take less time to research based on how much gold has been obtained through trade.
• Mongols: The technology is available in the Blacksmith. They can research the improved version for another 900 stone to upgrade siege engines' hit points by an additional +10% (+30% total).

Changelog

• Originally, Siege Works was available at the Siege Workshop and Astronomical Clocktower, cost 150 wood, 350 gold, took 60 seconds to research, and the Mongol Improved version cost 500 stone. With the Season One Update, it is available at the University (or Blacksmith for the Mongols), costs 300 wood, 700 gold, takes 90 seconds to research, and the Mongol Improved version cost 1,000 stone. With update 12.0.1974, it costs 300 wood, 600 gold and the improved version costs 900 stone.
• Originally, the base research time for the Delhi Sultanate was 5x default (300 seconds). With update 8324, this was increased to 15x default (900 seconds). With Season Two Update 17718, it takes 12x as long (1080 seconds).
• Originally, Siege Works provided 3 ranged armor bonus, and the Mongols' Improved Siege Works provided 4 ranged armor bonus. With Season Two Update 17718, Siege Works provides 10 ranged armor bonus, and the Mongols' Improved Siege Works provides 15 ranged armor bonus. With update 12.0.1974, neither the base nor improved versions provide any ranged armor bonus.

Campaign version

Because the campaigns do not get rebalanced with each update, Siege Works maintains the same stats in each campaign that it had upon the campaign's release. Therefore, in the original four campaigns:

• It is researched at the Arsenal
• It costs 75 food, 400 gold and takes 60 seconds to research
• It only grants siege engines +4 fire armor with no hit point or ranged armor bonus
• The Mongols improved version correspondingly costs an extra 475 stone and grants an additional +2 fire armor (+6 total)

In the The Sultans Ascend campaign

• It costs 300 food, 700 gold and grants +10 ranged armor to siege engines in addition to increasing their hit points by 20%.