Budapest later, with the help of the Russian Empire. 1867 was the year of Reconciliation that brought about the birth of Austria-Hungary. This made Budapest the twin capital of a dual monarchy. It was this compromise which opened the second great phase of development in the history of Budapest, lasting until World War I. In 1849 the Chain Bridge linking Buda with Pest was opened as the first permanent bridge across the Danube and in 1873 Buda and Pest were officially merged with the third part, Óbuda (Old Buda), thus creating the new metropolis of Budapest. The dynamic Pest grew into
Siege of Budapest the old town. The Red Army, after a much-needed pause in hostilities, resumed its offensive on 19 December. On 26 December, a road linking Budapest to Vienna was seized by Soviet troops, thereby completing the encirclement. The Nazi-supported "Leader of the Nation" ("Nemzetvezető"), Ferenc Szálasi, had already fled from the city on 9 December. As a result of the Soviet link-up, nearly 33,000 German and 37,000 Hungarian soldiers, as well as over 800,000 civilians, became trapped within the city. Refusing to authorize a withdrawal, Adolf Hitler had declared Budapest a fortress city ("Festung Budapest"), which was to be defended to