What does Napoleonic Warfare do in AoE3?

Coureur des Bois: XP for building −20%. The game says: "You receive more XP for defeating enemy units, but Sansculottes now provide less XP."

Home City card

Napoleonic Warfare

Napoleonic Warfare (tech ID DEHCREVNapoleonicWarfare) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Discovery Age. Effect: Coureur des Bois: XP for building −20%.

Quick answers (3)

Which civilizations have the Napoleonic Warfare card?: French.
What does Napoleonic Warfare do in AoE3?: Coureur des Bois: XP for building −20%. The game says: "You receive more XP for defeating enemy units, but Sansculottes now provide less XP."
What is the tech ID of Napoleonic Warfare?: DEHCREVNapoleonicWarfare.

You receive more XP for defeating enemy units, but Sansculottes now provide less XP.

What it does

Coureur des Bois: XP for building −20%

1 further effect (interface, visuals or AI) not listed.

Cost: 1
Sent from: I
Times it can be sent: 1
Game ID: DEHCREVNapoleonicWarfare

In these decks

FrenchI×1

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