Complex sentence: On 20 July Saltykov moved a portion of his troops toward Kay and Zullichau, and established himself astride Wedel's communication line at the Oder.This effectively cut the Prussians off from Crossen and Frankfurt (Oder).
Split into simpler sentences: On 20 July Saltykov moved a portion of his troops toward Kay and Zullichau, and established himself astride Wedel's communication line at the Oder. The effectively cut the Prussians off from Crossen and Frankfurt (Oder).