Ptolus: Running the Campaign - Simple Simulationist Tactics: Half Across the River (Patreon)

The Alexandrian " Ptolus: Running the Campaign - Simple Simulationist Tactics: Half Across the River

As for deploying the army and fathoming the enemy: (...) After crossing rivers you must distance yourself from them. If the enemy is forging a river to advance, do not confront them in the water. When half their forces have crossed, it will be advantageous to strike them.