Under directions from Heydrich, SD operative Alfred Naujocks was re-activated to engage in sabotage activities designed to incite a response from the Slovaks and the Czechs, a mission that ultimately failed.[35] In June 1938 a directive from the SD head office indicated that Hitler issued an order at Jueterbog to his generals to prepare for the invasion of Czechoslovakia.[36] To hasten a presumed heavy response from the French, British, and Czechs, Hitler then upped the stakes and claimed that the Czechs were slaughtering Sudeten Germans.