Agent Tate (a Dane sent to England in 1941 and turned double shortly after) opened the operation, on 23 May, in a message to his German handlers stating that a friend from the US had identified an expeditionary force, consisting of six divisions, preparing to sail. On 29 May, Bronx sent a telegram identifying an invasion targeted at the Bordeaux region within a month, using the code "dentist" to say she was certain of the information. She also sent a follow-up letter explaining that the information came from a drunken British officer in the Four Hundred Club who had later sworn her to secrecy. According to Bronx, the officer had boasted about an airborne assault in the Bordeaux region that would be in the papers the following morning. The next day he had told her the operation had been delayed by a month.