Original sentence: As originally envisioned, the Maginot Line was part of a larger defence plan, in which the attackers would meet with resistance from the French Army, but planning in general failed, leading to the loss of effectiveness of the Line
Edited sentence: As originally envisioned, the Maginot Line was part of a larger defence plan, in which the attackers would meet with resistance from the French Army, but the French did not implement the latter part, leading to the loss of effectiveness of the Line