William Robson 
The Great Sieges of History [PDF ebook] 
(Illustrated Edition)

Late events have proved that, notwithstanding the dreams of visionary philosophers and the hopes of philanthropists, the Millennium is not yet arrived; the lamb cannot yet lie down in peace with the lion. Science has performed miracles to procure comforts and luxuries for man; literature and art have exerted their genial influence over his life and manners; and commerce has brought nations, geographically remote from each other, into the most intimate relations. And yet the roots of all evils—interests, passions, and ambitions—are as actively alive in promoting discord, as at the darkest periods of the world’s history.
Encouraged by the evident advantages arising from the absence of war, a kindly but enthusiastic body of enlightened men came forth to preach a new description of crusade, a crusade for universal peace; and yet, years after the promulgation of this holy mission, a nation, by far the largest in geographical extent, thinks its time arrived, throws off the mask, and boldly avows that, while other peoples have been fostering plans of universal amity and brotherhood, it has been ever insidiously working out its schemes for the subjugation of all the rest to its arbitrary power.
For my humble part in this eventful story, I have much indulgence to request. To give such an account of the Great Sieges of History as the subject deserved, in one volume, was a thing impossible; and yet that was my task. The details of most of the sieges I have been obliged to curtail, and to entirely omit some which, I fear, may be looked for by those who are locally interested in them. Nevertheless, I have spared neither labour nor research; and if earnestness of purpose and honesty of intention merit approbation, I may, I trust, hope for as much as such a work deserves.
In the arrangement of the sieges, after taking the first one to which each place had been subjected in chronological order, I judged it best to carry on the account so as to give a continuous sketch of the sieges, or, in other words, of the history of the country or city in question. After the first perusal, such a book as this will be considered a work of reference, and, in that view, this plan must be the best. For the same reason I have admitted many sieges that cannot be classed as “great, ” because they formed connecting links between the large ones. Without them, the unlearned reader would be surprised, when next his attention was drawn to a city which had cost one power immense sacrifices to obtain, to find it in the possession of another.
As no two historians or chronologers agree about ancient dates, I have had much trouble in settling the periods at which sieges out of the regular pale of history took place. In such cases my best plan was to adopt the opinion of the highest authority, and, wherever there was a doubt, and his name was available, I have followed Archbishop Ussher.