What does Native Alliance do in AoE3?

Native Warrior: Coin cost −10%, Food cost −10%, Wood cost −10%, Influence cost −10%. The game says: "Native warriors are less expensive and you can train more of them."

Home City card

Native Alliance

Native Alliance (tech ID YPHCNativeIncorporation) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 3 civilizations, sent from the Colonial Age. Effect: Native Warrior: Coin cost −10%, Food cost −10%, Wood cost −10%, Influence cost −10%.

Quick answers (3)

Which civilizations have the Native Alliance card?: Aztecs, Inca and Japanese.
What does Native Alliance do in AoE3?: Native Warrior: Coin cost −10%, Food cost −10%, Wood cost −10%, Influence cost −10%. The game says: "Native warriors are less expensive and you can train more of them."
What is the tech ID of Native Alliance?: YPHCNativeIncorporation.

Native warriors are less expensive and you can train more of them.

What it does

Native Warrior: Coin cost −10%, Food cost −10%, Wood cost −10%, Influence cost −10%, build limit +20%

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

In these decks

AztecsII×1

IncaII×1

JapaneseII×1

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