What does Saxon Banner do in AoE3?

Ships 1 Trabant per Polish Banner Barracks Count; Trabant: becomes available, population set to 1. The game says: "Sends 1 Trabant for each Folwark and Barracks. Enables them in Barracks with a build limit."

Home City card

Saxon Banner

Saxon Banner (tech ID DEHCBannerTrabant) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Colonial Age. Effect: Ships 1 Trabant per Polish Banner Barracks Count; Trabant: becomes available, population set to 1.

Quick answers (3)

Which civilizations have the Saxon Banner card?: Poles.
What does Saxon Banner do in AoE3?: Ships 1 Trabant per Polish Banner Barracks Count; Trabant: becomes available, population set to 1. The game says: "Sends 1 Trabant for each Folwark and Barracks. Enables them in Barracks with a build limit."
What is the tech ID of Saxon Banner?: DEHCBannerTrabant.

Sends 1 Trabant for each Folwark and Barracks. Enables them in Barracks with a build limit.

What it does

Ships 1 Trabant per Polish Banner Barracks Count(unit)
Trabant: becomes available, population set to 1

5 further effects (interface, visuals or AI) not listed.

Cost: 5001
Sent from: II
Times it can be sent: 1
Game ID: DEHCBannerTrabant

In these decks

PolesII×1

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