Translation of "확실합니다" in English

한가지만은 확실합니다.

but one thing is true.

페투바스티스가 이 전투를 승리한 것은 확실합니다.

We know that Petubastis won the battle

올해 국경 이동은 과거와 다르다는 것이 확실합니다

As soon as it became clear that this year's migration to the border was different than in past