During the German retreat, Florence was declared an undefended "open city", prohibiting further shelling and bombing in accordance with the Hague Convention. On 4 August, the retreating Germans decided to detonate charges along the bridges of the Arno linking the district of Oltrarno to the rest of the city, thus making it difficult for the New Zealand, South African and British troops to cross just before liberation. The German officer in charge of the demolitions, Gerhard Wolf, ordered that the Ponte Vecchio was to be spared. Before the war, Wolf had been a student in the city, and his decision has been honored with a memorial plaque on the bridge. Instead, an equally historic area of streets directly to the south of the bridge, including part of the Corridoio Vasariano, was destroyed using mines. Since then, the bridges have been restored exactly to their original forms using as many of the remaining materials as possible, but the buildings surrounding the Ponte Vecchio have been rebuilt in a style combining the old with modern design. The last days of battle for Florence were very intense because the Italian Fascists resistance skirmish known as "Franchi Tiratori". The Allied soldiers who died driving the Germans from Tuscany are buried in cemeteries outside the city, British and Commonwealth soldiers a few kilometers east of the center on the north bank of the Arno whilst Americans are about south of the city [http://www.asgdd.it//amevceme.htm.