What does Ducal Army do in AoE3?

Vistula Uhlan: hit points +15%, damage +15%; Musketeer: hit points +15%, damage +15%; Skirmisher: hit points +15%, damage +15%. The game says: "Increases the attack and hitpoints of Musketeers, Skirmishers, and Vistula Uhlans."

Home City card

Ducal Army

Ducal Army (tech ID DEHCREVWarsawCombat) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Vistula Uhlan: hit points +15%, damage +15%; Musketeer: hit points +15%, damage +15%; Skirmisher: hit points +15%, damage +15%.

Quick answers (3)

Which civilizations have the Ducal Army card?: Poles.
What does Ducal Army do in AoE3?: Vistula Uhlan: hit points +15%, damage +15%; Musketeer: hit points +15%, damage +15%; Skirmisher: hit points +15%, damage +15%. The game says: "Increases the attack and hitpoints of Musketeers, Skirmishers, and Vistula Uhlans."
What is the tech ID of Ducal Army?: DEHCREVWarsawCombat.

Increases the attack and hitpoints of Musketeers, Skirmishers, and Vistula Uhlans.

What it does

Vistula Uhlan: hit points +15%, damage +15%
Musketeer: hit points +15%, damage +15%
Skirmisher: hit points +15%, damage +15%

Cost: 1
Sent from: IV
Times it can be sent: 1
Game ID: DEHCREVWarsawCombat

In these decks

PolesIV×1

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