Arrowslits
University - ImperialEvolution
Arrowslits
Imperial
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Try it freeTechnology Effect
"+3 Attack for towers"
Coach's Tip
Arrowslits significantly increases tower attack damage. Excellent for tower rush strategies or defensive play.
Strategic Analysis
Strategic Identity
Arrowslits significantly increases tower attack damage. Excellent for tower rush strategies or defensive play.
When to Research
High Priority
Research Arrowslits as soon as you have the resources and are using university units.
Combat Impact
+3 Attack for towers
Civilization Access
* 28 civilizations have access to this technology.
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Other Technologies to Explore
AoE Coach analysis
Context & meta
Arrowslits is the Imperial Age University technology for Watch Towers, Guard Towers, Keeps and Donjons. It costs 250 food and 250 wood and takes 25 seconds to research. The official help defines the effect exactly: Watch Towers +1, Guard Towers +2, Keeps and Donjons +3 attack. The affected force must be active in the next fight. It is a build breakpoint: spend now to improve an existing composition. It pays when several affected units are ready. Its timing matters because an upgrade that finishes after the battle cannot change that battle.
History & balance
Arrowslits uses a compact historical label to describe a long technical step. The name points to narrow openings that let a fortification project force outward, and the game expresses the idea as different attack gains by tower level. AoE2 reduces that development to one research button, but the concept remains readable: the upgrade changes the way an established tool survives, reaches, or delivers force. This is why it belongs to the technology tree rather than the unit card. The name also gives a useful coaching cue: do not judge it in isolation; judge the equipment line, the building, and the battlefield role that it completes.
In pro play
Use Arrowslits when the opponent must cross a tower line or your Imperial wall will be defended by several affected structures. Keep 250 food and 250 wood and the 25 seconds research time in the plan. Watch Towers +1, Guard Towers +2, Keeps and Donjons +3 attack. The clean execution is to queue the research before the mass is fully exposed, keep relevant production or defense preparation running where possible, and make the first upgraded engagement deliberate. The classic error is buying it for one isolated tower while the real fight happens elsewhere, or waiting until the siege is already in range. If timed well, it changes the next fight.
How to counter it
There is no military unit that counters Arrowslits; the practical answer is to read the research window. Pressure the research building or fight before completion. Effect: Watch Towers +1, Guard Towers +2, Keeps and Donjons +3 attack. The common mistake is buying it for one isolated tower while the real fight happens elsewhere, or waiting until the siege is already in range. Track the research building and resource bank; an early click can delay units. If you struggle against this timing without knowing what to produce or when, AoE Coach reads your matchup and gives you the composition and timing.