Say Charles XV follows through on his promise and joins Denmark in the Second Schleswig War. Would it possible to pressure the Danish government into joining a united Scandinavia under Swedish leadership? I assume despite Swedish involvement, that the war would still be a defeat but possibly on better terms seeing something around the modern border. A Swedish entrance would increase Pan-Scandinavism among the Danish population along with the presence of Swedish troops could apply pressure on the Danish government. I imagine a united Scandinavia would be a federal state along the lines of the German Empire.Despite Charles XV's promise to send troops, Sweden-Norway refused to aid Denmark. Consequently, the pan-Scandinavism movement focused on literature and language rather than political unification. Likewise, the war proved to be a diplomatic setback for the British government, whose attempts to mediate the conflict and deter Prussia were rebuffed.