Complex sentence: The aforementioned military movements happened within weeks, Zhong Hui's rapid advance was beyond most Shu general's comprehension, as they realized the danger of letting the enemy in, Jiang Wei and his comrades were struck in Jian'ge.
Split into simpler sentences: The aforementioned military movements happened within weeks, and Zhong Hui's rapid advance shocked most Shu generals. As they realized the danger of letting the enemy in, Jiang Wei and his comrades were still struck in Jian'ge.