On 5 June Sperrle's forces flew eight bombing operations against railways and localities, 21 to 31 against road targets, 12 against troop columns and 34 to 42 against French Army defences or strongpoints. II. "Fliegerkorps" alone flew 276 bombing missions. On 12 June, as the French front collapsed, Sperrle planned a new assault upon Paris, but it was declared an open city before it could be carried out. Sperrle was ordered to support Rundstedt advancing southward, with orders to encircle the Maginot Line, from the west. "Luftflotte" 3 carried out bridge interdiction operations in the Loire and on 17 June Guderian reach the border with Switzerland completing the encirclement. The campaign played out for a further five days, which came as Luftwaffe logistics were breaking down—fuel and ammunition shortages were acute and relied on air transportation. Sperrle attempted to prevent the British Operation Ariel—a second evacuation—but the only success was the sinking of "Lancastria", with 5,800 lives lost.