 In March 1943 , Strong was appointed Assistant Chief of Staff for Intelligence ( G @-@ 2 ) at General Dwight Eisenhower 's Allied Force Headquarters ( AFHQ ) , replacing Brigadier Eric Mockler @-@ Ferryman , whose over @-@ reliance on Ultra sources had led to a misinterpretation of the enemy 's intentions leading up to the disastrous Battle of the Kasserine Pass . Strong got on well with Eisenhower and his chief of staff , Major General Bedell Smith in particular , and Americans in general . Stephen Ambrose wrote : 
