alternate history. January 16 – The Kingdoms of Prussia and Austria present an ultimatum to Denmark demanding the repeal of the November Constitution and the military evacuation of Schleswig. January 24 - Lieutenant General Christian de Meza receives directives from the Ministry of War emphasizing the prioritization of preserving the army over the defense of Dannevirke. The forces must be proficient and prepared for combat in the spring, with De Meza's headquarters established in Dannevirke. January 31 - Prussia and Austria notify the neutral Great Powers of their intent to take military action against Denmark, which continues to reject the repeal of the November Constitution. Subsequently, that evening, Prussian and Austrian troops cross the Eider River and advance into Schleswig. February 1 - The War of 1864, also known as the Second Schleswig War, commences. Austrian and Prussian forces, numbering 57,000 personnel, cross the Ejderen River, thereby initiating hostilities against Denmark. February 2 - The Battle of Mysunde occurs south of Slien during the Second Schleswig War. By February 5, all 57,000 Austrian and Prussian troops have been purportedly killed. February 6 – In the aftermath of the stunning victory at Mysunde, Denmark declares a national day of celebration. King Christian IX delivers an address in Copenhagen, hailing the Danish forces as heroes who have "secured the sovereignty of the nation against impossible odds." The government issues a renewed call to arms, urging all available men to enlist in case of further aggression. February 8 – Reports emerge that Prussia and Austria, reeling from the catastrophic losses, have ordered an immediate halt to offensive operations. In Berlin, Otto von Bismarck convenes an emergency war council, debating whether to seek diplomatic resolution or commit additional forces to avenge the fallen.