ian ▁academic ▁career ▁H att endorf ▁has ▁spent ▁most ▁of ▁his ▁civil ian ▁academic ▁career ▁at ▁the ▁United ▁States ▁Naval ▁War ▁College , ▁returning ▁there ▁as ▁a ▁civil ian ▁fac ulty ▁member ▁in ▁ 1 9 7 7 . ▁He ▁taught ▁Str ategy ▁and ▁Policy ▁for ▁a ▁number ▁of ▁years . ▁From ▁ 1 9 8 8 ▁to ▁ 2 0 0 3 , ▁he ▁directed ▁the ▁United ▁States ▁Naval ▁War ▁College ' s ▁Advanced ▁Research ▁Department . ▁In ▁ 2 0 0 3 , ▁H att endorf ▁became ▁the ▁first ▁chairman ▁of ▁the ▁Naval ▁War ▁College ' s ▁newly ▁established ▁Mar itime ▁History ▁Department , ▁where ▁he ▁o vers aw ▁its ▁research ▁section ▁and ▁also ▁the ▁director ▁of ▁the ▁Naval ▁War ▁College ▁Museum . ▁He ▁retired ▁in ▁September ▁ 2 0 1 6 ▁and ▁was ▁promoted ▁to ▁Ernest ▁J . ▁King ▁Professor ▁Emer it us ▁of ▁Mar itime ▁History . ▁He ▁identified ▁four ▁primary ▁aud ien ces ▁for ▁the ▁U . S . ▁Navy ' s ▁mar itime ▁history ▁programs : ▁sail ors , ▁Navy ▁leaders , ▁government ▁polic ym akers , ▁and ▁the ▁American ▁people . ▁ ▁As ▁a ▁civil ian ▁scholar , ▁he ▁has ▁been ▁visit ing ▁professor ▁of ▁history ▁at ▁the ▁National ▁University ▁of ▁Singapore ▁and ▁at ▁the ▁German ▁Ar med ▁Forces ▁Military ▁History ▁Research ▁Office , ▁a ▁senior ▁associate ▁member ▁of ▁St ▁Anton y ' s ▁College , ▁Oxford , ▁and ▁a ▁visit ing ▁Fellow ▁at ▁P embro ke ▁College , ▁Oxford . ▁He ▁has ▁been ▁an ▁adj