218 BC · Trebia River, Italy
Hannibal's first major victory in Italy: he lured a Roman army across the icy Trebia at dawn, then crushed it with a concealed force under his brother Mago.
By late 218 BC Hannibal had done what Rome believed impossible: he had brought a Carthaginian army out of Spain, across the Pyrenees and over the Alps, and down into the Po valley, his men exhausted and his elephants and horses much reduced. The Second Punic War was months old and was already being fought in Italy rather than in Spain or Africa, where Rome had intended to fight it.
The consul Tiberius Sempronius Longus was recalled from Sicily, where he had been preparing an invasion of Africa, and joined Publius Cornelius Scipio near the Trebia, a tributary of the Po. Scipio had been wounded in a cavalry action at the Ticinus shortly before and argued for waiting. Sempronius, whose consular year was running out, wanted the battle.
Hannibal read both men, had already drawn the Gallic tribes of the region away from Rome, and chose the ground himself.
On a cold December morning Hannibal sent his Numidian cavalry to harass the Roman camp and then fall back. Sempronius took the bait and put his army into the field unfed and without waiting for the day to warm, sending it through the icy Trebia, which was running high.
The Romans came out of the water wet, cold and stiff, and formed up against a Carthaginian line that had eaten and warmed itself at fires. Cavalry and elephants pressed the Roman wings while the infantry held the centre.
The decisive stroke had been placed the night before: Hannibal's brother Mago lay hidden with a picked force in the broken ground along a watercourse and struck the Roman rear once the lines were fully engaged. The Roman army broke. Its centre, some ten thousand men, cut its way straight through the Carthaginian line and reached Placentia; most of the rest did not.
Trebia was the first of the three disasters that opened the war in Italy, and it set their pattern: Hannibal chose the ground, provoked the engagement on his own terms, and used concealed troops and cavalry against a heavier but less flexible opponent.
It cost Rome an army and, more lastingly, the Gallic north. Tribes that had been undecided came over after the victory, giving Hannibal the manpower and the country he needed to stay in Italy. Lake Trasimene followed in 217 and Cannae in 216.
The scenario is built around what the battle actually turned on: a Roman force that is strong in a straight fight but starts at a disadvantage, and a Carthaginian force whose strength is what it has kept out of sight. Both sides are playable, because the problem is interesting from either chair: Rome must reach a decision before the trap closes, Carthage must keep it closed.
What is history and what is game are worth keeping apart. The commanders, the sides, the river and the ambush are historical. The card pool, the energy economy, the turn structure and the individual card effects are the game's own language, chosen so a match lasts minutes and stays readable, not a claim about how the battle was fought.