7 7 4 . ▁ ▁Then ▁as ▁a ▁Captain , ▁he ▁led ▁a ▁company ▁of ▁ 1 0 8 ▁men ▁to ▁Cambridge , ▁Massachusetts , ▁in ▁April ▁ 1 7 7 5 ▁following ▁the ▁attacks ▁on ▁Lex ington ▁and ▁Con cord . ▁ ▁On ▁July ▁ 4 , ▁ 1 7 7 6 , ▁he ▁was ▁appointed ▁Colonel ▁in ▁Wing ate ’ s ▁Regiment . ▁ ▁He ▁turned ▁down ▁command ▁of ▁a ▁New ▁Ham pshire ▁regiment ▁in ▁ 1 7 7 6 ▁to ▁“ fit ▁out ” ▁armed ▁vessels ▁built ▁in ▁New ▁Ham pshire . ▁ ▁In ▁ 1 7 7 8 , ▁he ▁volunte ered ▁for ▁duty ▁under ▁General ▁S ull ivan ▁in ▁Rh ode ▁Island ▁in ▁a ▁company ▁raised ▁by ▁ ▁Colonel ▁John ▁Lang don ▁in ▁Port sm outh ▁and ▁was ▁made ▁lieutenant . ▁ ▁He ▁served ▁as ▁Colonel ▁in ▁the ▁battle ▁Sar at oga ▁with ▁Lang don ’ s ▁New ▁Ham pshire ▁Independent ▁Company . ▁ ▁For ▁his ▁ind isp ens able ▁services , ▁H ack ett ▁was ▁given ▁command ▁of ▁a ▁batt alion ▁of ▁art illery ▁of ▁three ▁companies ▁in ▁Port sm outh . ▁ ▁He ▁had ▁the ▁honor ▁of ▁receiving ▁General ▁Washington ▁with ▁a ▁“ grand ▁sal ute ” ▁at ▁the ▁occasion ▁of ▁his ▁Ex cell ency ’ s ▁reception ▁at ▁Port sm outh ▁on ▁October ▁ 3 1 , ▁ 1 7 8 9 . ▁ ▁Sh ip builder ▁for ▁the ▁Cont inental ▁Navy ▁ ▁Colonel ▁H ack ett ▁is ▁best ▁known ▁as ▁a ▁Master ▁Sh ip