खोला सानजा खानसे बाहागोआ 1818 मायथायाव ग्रेत ब्रितैइनिफ्राय लाजादोंमोन जाय समाव कानादाजों हादोर इसिङारि सिमाया 49 पेरेलालाव थि कालामनाय जादोंमोन ।
The southeastern half was acquired from Great Britain in 1818 when the international line with Canada was fixed at the 49th parallel .