What does British Grenadiers do in AoE3?

Grenadier: damage (Siege) +15%, damage (Mortar Building) +15%, damage +20%; Grenadier: line of sight +2. The game says: "Equips Grenadiers with a hand mortar, which have higher range and Grenadiers do more damage, especially vs. buildings."

Home City card

British Grenadiers

British Grenadiers (tech ID HCXPImprovedGrenades) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Fortress Age. Effect: Grenadier: damage (Siege) +15%, damage (Mortar Building) +15%, damage +20%; Grenadier: line of sight +2.

Quick answers (3)

Which civilizations have the British Grenadiers card?: British.
What does British Grenadiers do in AoE3?: Grenadier: damage (Siege) +15%, damage (Mortar Building) +15%, damage +20%; Grenadier: line of sight +2. The game says: "Equips Grenadiers with a hand mortar, which have higher range and Grenadiers do more damage, especially vs. buildings."
What is the tech ID of British Grenadiers?: HCXPImprovedGrenades.

Equips Grenadiers with a hand mortar, which have higher range and Grenadiers do more damage, especially vs. buildings.

What it does

Grenadier: damage (Siege) +15%, damage (Mortar Building) +15%, damage +20%
Grenadier: line of sight +2

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

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

In these decks

BritishIII×1

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