What does Svea Lifeguard do in AoE3?

Carolean: hit points +15%; Grenadier: hit points +25%. The game says: "Caroleans now resist against Ranged damage, instead of Melee. Carolean and Grenadier hitpoints improved."

Home City card

Svea Lifeguard

Svea Lifeguard (tech ID DEHCSveaLifeguard) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Carolean: hit points +15%; Grenadier: hit points +25%.

Quick answers (3)

Which civilizations have the Svea Lifeguard card?: Swedes.
What does Svea Lifeguard do in AoE3?: Carolean: hit points +15%; Grenadier: hit points +25%. The game says: "Caroleans now resist against Ranged damage, instead of Melee. Carolean and Grenadier hitpoints improved."
What is the tech ID of Svea Lifeguard?: DEHCSveaLifeguard.

Caroleans now resist against Ranged damage, instead of Melee. Carolean and Grenadier hitpoints improved.

What it does

Carolean: hit points +15%
Grenadier: hit points +25%

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

Cost: 1
Sent from: IV
Times it can be sent: 1
Game ID: DEHCSveaLifeguard

In these decks

SwedesIV×1

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