What does Polish Cavalry Combat do in AoE3?

Winged Hussar: hit points +10%, damage +10%; Retainer: hit points +10%, damage +10%. The game says: "Polish heavy cavalry attack and hitpoints increased."

Home City card

Polish Cavalry Combat

Polish Cavalry Combat (tech ID DEHCCavalryCombatPolish) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Colonial Age. Effect: Winged Hussar: hit points +10%, damage +10%; Retainer: hit points +10%, damage +10%.

Quick answers (3)

Which civilizations have the Polish Cavalry Combat card?: Poles.
What does Polish Cavalry Combat do in AoE3?: Winged Hussar: hit points +10%, damage +10%; Retainer: hit points +10%, damage +10%. The game says: "Polish heavy cavalry attack and hitpoints increased."
What is the tech ID of Polish Cavalry Combat?: DEHCCavalryCombatPolish.

Polish heavy cavalry attack and hitpoints increased.

What it does

Winged Hussar: hit points +10%, damage +10%
Retainer: hit points +10%, damage +10%

Cost: 1
Sent from: II
Times it can be sent: 1
Game ID: DEHCCavalryCombatPolish

In these decks

PolesII×1

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