N'August 1861, Ọchịagha Ukwu Benjamin F. Butler na Ọfịsa Na-ahụ Maka Ọkọlọtọ Silas H. Stringham weghaara Fort Hatteras na Clark
na-eche nche n'ebe a na-esi abanye n'Oké Osimiri Pamlico. O were ọnwa ole na ole tupu ndị isi ndị agha nke Union ga-eji ihe ịga nke ọma a mee ihe. Butler na Stringham nwere ike ime ka odeakwụkwọ nke ndị agha mmiri Gideon Welles mee ka ike dị na Hatteras Inlet iji mee ka ohere nke ọrụ ndị ọzọ meghee. Ọchịchị Lincoln ekwenyeghị na ịwakpo North Carolina site n'oké osimiri, mana General-in-Chief George B. McClellan kwadoro ụdị ọrụ ahụ. McClellan nwere ike ime ka President Lincoln nye ikike maka ọrụ ahụ ma họrọ Brigadier General Ambrose E. Burnside iduzi njem ahụ.