Sweden, Denmark, and the Netherlands join Germany in 1915

What if Sweden, Denmark, and the Netherlands entered World War I on Germany’s side in 1915?

It would go badly: they would lose neutral trading privileges, expose overseas possessions, and add too little strength to overcome the established Allied blockade.

Sweden, Denmark, and the Netherlands would add less military strength to Germany than they would surrender by abandoning neutrality. Because the Allied blockade was already established in 1915, their merchant ships and cargoes outside it would become enemy assets vulnerable to immediate seizure. The Dutch East Indies would invite a race between Britain and Japan, while other overseas holdings and shipping would be similarly exposed. If the Central Powers still lost, all three states would also face the punitive territorial and treaty consequences imposed on Germany and Austria-Hungary.