Croyland Chronicle on escalating tension 1453-1462

And not only among princes and people had such a spirit of contention arisen, but even in every society, whether chapter, college, or convent, had this unhappy plague of division effected an entrance; so much so, that brother could hardly with any degree of security admit brother into his confidnece, or friend a friend, nor could any one reveal the secrets of his conscience without giving offence. The consequence was, that, from and after this period of time, the combatants on both sides, uniting their respective forces together, attacked each other whenever they happened to meet, and, quite in accordance with the doubtful issue of warfare, now the one and now the other, for the moment gained the victory, while fortune was continually shifting her position. In the meantime, however, the slaughter of men was immense; for besides the dukes, earls, barons, and distinguished warriors who were cruelly slain, multitudes almost innumerable of common people died of their wounds. Such was the state of the kingdom for nearly ten years.

Source: http://www.r3.org/on-line-library-text-essays/crowland-chronicle/part-ii/

The Wars of the Roses

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