The Free Companies, or hordes of robbers, who ravaged Europe through all the period of chivalry and constituted the greatest social difficulty of the time, were simply formed of knights and men-at-arms, who, when a public war no longer justified them in robbing and murdering on behalf of the State, turned robbers and murderers on their own account. After the treaty of Bretigny had put a stop to hostilities between France and England (1360), 12,000 of these men, men of rank and family as well as needy adventurers, and under leaders of every nationality, resolved sooner than lay down their arms to march into Burgundy, there to relieve by the ransoms they might levy the poverty they could not otherwise avert. Many a war had no other justification than the liberation of one people from their outrages by turning them upon another. Thus Du Guesclin led his White Company into Spain on behalf of Henry the Bastard, less to avenge the cruelties of Pedro than to free France from the curse of her unemployed chivalry; and Henry the Bastard, when by such help he had wrested the kingdom of Castile from his brother Pedro, designed an invasion of Granada simply to divert from his own territories the allies who had placed him in possession of them. This was a constant source of war in those days, just as in our own the existence of large armies leads of necessity to wars for their employment; and even the Crusades derive some explanation from the operation of the motive indicated. No historical microscope, indeed, will detect any difference between the Free Companies and the regular troops, since not only the latter merged into the former, but both were actuated by the sole pursuit of gain, and equally indifferent to ideas of honour or patriotism. The creed of both was summed up in the following regretful speech, attributed to Aymerigot Marcel, a great captain of the pillaging bands: ‘There is no pleasure in the world like that which men such as ourselves enjoyed. How happy were we when, riding out in search of adventures, we met a rich abbot, a merchant, or a string of mules, well laden with draperies, furs, or spices, from Montpellier, Beziers, and other places! All was our own, or ransomed according to our will. Every day we gained money, ... we lived like kings, and when we went abroad the country trembled; everything was ours both in going and returning.’