What does Wilderness Warfare do in AoE3?

Coureur des Bois: hit points +15%; Cree Coureur des Bois: hit points +15%; Native Warrior: hit points +15%; Skirmisher: hit points +20%. The game says: "Coureur, Skirmisher and Native Warrior hitpoints increased."

Home City card

Wilderness Warfare

Wilderness Warfare (tech ID HCWildernessWarfare) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 2 civilizations, sent from the Colonial Age. Effect: Coureur des Bois: hit points +15%; Cree Coureur des Bois: hit points +15%; Native Warrior: hit points +15%; Skirmisher: hit points +20%.

Quick answers (3)

Which civilizations have the Wilderness Warfare card?: British and French.
What does Wilderness Warfare do in AoE3?: Coureur des Bois: hit points +15%; Cree Coureur des Bois: hit points +15%; Native Warrior: hit points +15%; Skirmisher: hit points +20%. The game says: "Coureur, Skirmisher and Native Warrior hitpoints increased."
What is the tech ID of Wilderness Warfare?: HCWildernessWarfare.

Coureur, Skirmisher and Native Warrior hitpoints increased.

What it does

Coureur des Bois: hit points +15%
Cree Coureur des Bois: hit points +15%
Native Warrior: hit points +15%
Skirmisher: hit points +20%
Settler: hit points +20%

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

In these decks

BritishII×1

FrenchII×1

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