Complex sentence: Ensuing instability prevented the Grand Duchy of Lithuania from taking full advantage of the weakened orders, however, while the orders were occupied reconquering rebelling territories and did not pose a danger to Lithuania until the 1280s.
Split into simpler sentences: Ensuing instability prevented the Grand Duchy of Lithuania from taking full advantage of the weakened orders. However, the orders were occupied reconquering rebelling territories and did not pose a greater danger to Lithuania until the 1280s.