From Dominic Lieven’s Russia Against Napoleon:
Though all four continental great powers were in theory absolute monarchies, no one doubted that the power of The Russian emperor was more complete than that of his French Austrian or even Prussian peers. He could make laws and tax his peoples without their consent, and no laws protected even his most aristocratic subjects against his arbitrary whims. By contrast, especially in France and Austria, aristocratic assemblies and judicial institutions inherited from medieval feudalism inhibited a monarch’s power, as indeed did the ethos of the social elites, including sometimes of the monarchs themselves and their relatives. Other factors also enhanced the power of the Russian autocrat. For examples, in Protestant Europe the previously enormous landholdings of the Catholic church had been confiscated during the Reformation and had mostly fallen into the hands of the aristocracy. In eighteenth-century Catholic Europe most of these lands were still held by the Church. In Russia, however, the monarchy had confiscated the vast wealth of the Orthodox Church by the 1760s and largely held on to it for itself. That was one key reason why by the 1790s more than 40 per cent of the entire serf population “belonged” not to private landlords but to the crown.
The Russian army traditionally fought with a higher ratio of artillery to infantry than was the case elsewhere in Europe.
The Russians instead soon overran the principalities of Moldova and Wallachia, and made their acquisition the key war aim.
I found this book very useful for understanding the mindset of Putin and some of the other Russian elites. For instance, none of the characters in this earlier history seemed to regard the national borders of the status quo as anything close to sacrosanct.