Complex sentence: Paraguay's biggest success in the ultimately disastrous war was limited because its military leader Francisco Solano López did not counterattack the defeated Allies; not even a general as celebrated as Díaz would attack without López's orders.
Split into simpler sentences: Paraguay's biggest success in the ultimately disastrous war was limited because its military leader Francisco Solano López did not counterattack the defeated Allies. Not even a general as celebrated as Díaz would attack without López's orders.