What does Birchbark do in AoE3?

War Canoe: Wood cost −25%; Tlaloc Canoe: Wood cost −25%; Canoe: Wood cost −25%. The game says: "All types of canoes cost less Wood."

Home City card

Birchbark

Birchbark (tech ID DEBirchbark) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Fortress Age. Effect: War Canoe: Wood cost −25%; Tlaloc Canoe: Wood cost −25%; Canoe: Wood cost −25%.

Quick answers (3)

Which civilizations have the Birchbark card?: Lakota.
What does Birchbark do in AoE3?: War Canoe: Wood cost −25%; Tlaloc Canoe: Wood cost −25%; Canoe: Wood cost −25%. The game says: "All types of canoes cost less Wood."
What is the tech ID of Birchbark?: DEBirchbark.

All types of canoes cost less Wood.

What it does

War Canoe: Wood cost −25%
Tlaloc Canoe: Wood cost −25%
Canoe: Wood cost −25%

Cost: 1
Sent from: III
Times it can be sent: 1
Game ID: DEBirchbark

In these decks

LakotaIII×1

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