on 3 september 1943, british eighth army's xiii corps launched "operation baytown". italian troops surrendered. on 4 september, 5 division reached bagnara. progress was slow as blown up bridges, roadblocks and mines delayed eighth army. heinrich von vietinghoff's 10th army was ready to attack the allied landings. on 8 september (before the main invasion), the surrender of italy to the allies was announced. italian troops stopped fighting and the navy sailed to allied ports to surrender. the german forces in italy moved into important defensive positions. "operation slapstick" started on 9 september.