Complex sentence: The part of the Austrians was well understood to be politically rather than morally hostile, and Schwarzenberg gained some minor successes by skilful manoeuvres without a great battle; afterwards, under instructions from Napoleon, he remained for some months inactive at Pultusk.
Split into simpler sentences: The part of the Austrians was well understood to be politically rather than morally hostile, and Schwarzenberg gained some minor successes by skilful manoeuvres without a great battle. Afterwards, under instructions from Napoleon, he remained for some months inactive at Pultusk.