Complex sentence: This was due in part to an adherence to Habsburg dynastic tradition and his sense of familial responsibility; but by opposing the division of the Spanish Monarchy the Emperor also hoped to create a favourable impression in Madrid where the Partition Treaties had been received with consternation.
Split into simpler sentences: This was due in part to an adherence to Habsburg dynastic tradition and his sense of familial responsibility. However, by opposing the division of the Spanish Monarchy the Emperor also hoped to create a favourable impression in Madrid where the Partition Treaties had been received with consternation.