ISIS celebrates, lampoons Hagel’s departure on Twitter

The Islamic State of Iraq and Syria (ISIS) has turned to social media to celebrate the departure of U.S. Defense Minister Chuck Hagel on Twitter.

Following the announcement of Hagel’s resignation, the militant group sent self-congratulatory messages to its supporters and created an Arabic hashtag, “The Islamic State topples the American Defense Minister.”

Responding to the hashtag, one twitter user wrote: “[President Barack] Obama: You failed,” while another one said “The resignation of U.S. Secretary of War has shaken the thrones of tyrants everywhere.”

On Monday, Hagel stepped down after criticism of the U.S. campaigns in Afghanistan and against the ISIS which is in control of swathes of territory in Iraq and Syria.

Obama announced Hagel's resignation, saying the 68-year-old former senator and Vietnam war veteran had approached him last month to say it was time for him to leave.

Hagel had raised questions about Obama’s strategy toward Syria in a two-page internal policy memo he wrote that leaked, Reuters reported.