The tanks left Caterpillar Valley on the evening of 13 September. The tanks did not use their cross-country capability but were ordered to follow roads where their slow speed exacerbated traffic difficulties. C Company tanks moved east to Chimpanzee valley whilst D Company tanks went northeast towards the Green Dump. Several of the tanks broke down en route and three crews were issued with spares from the ten which had arrived straight from England on 10 September.
The preliminary bombardment started on 13 Sep.