 Complete the following phrase:  Following his VC action, Jacka instantly became a national hero; he received the 500 and gold watch that the prominent Melbourne business and sporting identity, John Wren, had promised to the first Australian of the war to receive the VC, his image was used on recruiting posters and magazine covers, and he received rapid promotions; first to corporal on 28 August, to sergeant two weeks later on 12 September, and then to company sergeant major on 14 November. He became company sergeant major of C Company, and saw much fighting at Gallipoli where, during August at 