Complex sentence: The unit became notorious for its daring low-altitude night raids on German rear-area positions, with veteran pilots, Yekaterina Ryabova and Nadezhda Popova on one occasion flying 18 such missions in a single night.
Split into simpler sentences: The unit became notorious for daring low-altitude night raids on German rear-area positions. Veteran pilots, Yekaterina Ryabova and Nadezhda Popova on one occasion flew eighteen such missions in a single night.