The US now accepted that it needed to increase spending for its own defense, especially with the growing threat of Japan, but there was real concern that Britain would fall before the weapons were delivered. Despite the success in evacuating a third of a million men at Dunkirk and the later evacuations from St Malo and St Nazaire, the British army left behind 2,500 heavy guns, 64,000 vehicles, 20,000 motor cycles and well over half a million tons of stores and ammunition. To help in the interim, Congress agreed to let Britain have a million mothballed First World War rifles, stored in grease with around fifty rounds of ammunition for each. But, following the British attack on the French fleet at Oran on 4 July to prevent it from falling into German hands, the British were proving they would do whatever was necessary to continue the fight, and Roosevelt was now winning his campaign to convince Congress to be even more supportive of Britain, with the Destroyers for Bases Agreement and with the approval of a British order for 4,000 tanks.