Complex sentence: Released soon afterwards from imprisonment, Lángara's career did not suffer; by 1793 he was a "Capitán General" of the Spanish fleet, after having served a stint as a most effective naval minister.
Split into simpler sentences: Released soon afterwards from imprisonment, Lángara's career did not suffer. By 1793 he was a "Capitán General" of the Spanish fleet, after serving for a time as an effective naval minister.