On 12 September, the day the Americans attacked at St Mihiel, Third Army began moving up to the Hindenburg Line by attacking at Havrincourt, beginning a fortnight of grinding progress against Germans who were still fighting hard on that sector. On 18 September Fourth Army attacked at Epehy, reaching the Hindenburg Line. Haig received a congratulatory note from Wilson saying "you must be a famous general", to which he replied that he was not (as this would have meant currying favour with Repington and the Northcliffe Press) but "we have a number of very capable generals".