AoE3 DatabaseAoE3: DE 100.19.18309 · read from the game files · unofficial

Technology

Royal Guard Stuarts

Royal Guard Stuarts (tech ID DEGuardStuart) is a technology in AoE3: Definitive Edition 100.19.18309 costing 350 wood, 350 coin, 10 s to research at the Trading Post. Effect: Clansman: hit points +40%, damage +40%; Clansman: hit points +40%, damage +40%; Lowlander: hit points +40%, damage +40%; Lowlander: hit points +40%, damage +40%.

Quick answers (3)
How much does Royal Guard Stuarts cost in AoE3?
350 wood, 350 coin, 10 seconds (AoE3: Definitive Edition 100.19.18309).
What does Royal Guard Stuarts do in AoE3?
Clansman: hit points +40%, damage +40%; Clansman: hit points +40%, damage +40%; Lowlander: hit points +40%, damage +40%; Lowlander: hit points +40%, damage +40%. The game says: "Stuart unit attack and hitpoints increased."
What is the tech ID of Royal Guard Stuarts?
DEGuardStuart.

Stuart unit attack and hitpoints increased.

What it does

Cost
Coin350Wood350
Research time
10 s
Game ID
DEGuardStuart

Researched at

Needs

Civilizations

BritishUnited StatesDanesIncaMexicansPolesFrenchGermansPortugueseRussiansSpanishAztecsHaudenosauneeLakota

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).