What does 2 Culverins + 2 Mortars do in AoE3?

Ships 2 Culverin; Ships 2 Mortar. The game says: "Specialized counter artillery and siege artillery."

Home City card

2 Culverins + 2 Mortars

2 Culverins + 2 Mortars (tech ID DEHCShipCulverineMortar) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Ships 2 Culverin; Ships 2 Mortar. It hands over about 1,900 resources' worth.

Quick answers (3)

Which civilizations have the 2 Culverins + 2 Mortars card?: Mexicans.
What does 2 Culverins + 2 Mortars do in AoE3?: Ships 2 Culverin; Ships 2 Mortar. The game says: "Specialized counter artillery and siege artillery."
What is the tech ID of 2 Culverins + 2 Mortars?: DEHCShipCulverineMortar.

Specialized counter artillery and siege artillery.

What it does

Ships 2 Culverin(unit)
Ships 2 Mortar(unit)

What it hands over

2 × Culverin500 each
2 × Mortar450 each

Total ≈ 1,900 resources — units at their train cost, crates and animals at what they hold.

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

In these decks

MexicansIV×1

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