Complex sentence: Numerous experiments were carried out to determine the possible role of bicycles and cycling within military establishments until in 1894 a turning point occurred due to improved resilience of pneumatics and the shorter sturdier construction of the frame.
Split into simpler sentences: Numerous experiments were carried out to determine the possible role of bicycles and cycling within the military establishments until in 1894 there was turning point. Reasons were the improved resilience of pneumatics and the shorter sturdier construction of the frame.