Carl: "In Stuttgart, the ace up Frost's sleeve is Napoleon Bonaparte's First Army, which is his primary force."
Alvizi: "Using the main force as a feint, truly crafty of Frost."
Carl: "No, no, no! The First Army has made a move, but Frost's other troops are still along the Rhein River!"
Alvizi, alarmed: "What, Frost's main force is at the Rhein? Isn't that very close to us?"
Grand Duke Carl paused, remembering that south of the Black Forest, the Rhein bends into an L-shape, turning east from Basel, heading directly this way.
Alvizi probably thought Frost had reached Schaffhausen.