Napoleon decisively defeated the Russians at Friedland (1807) and soon after concluded the Peace of Tilsit (p. 161). By this treaty there was created, out of a portion of the Polish lands received by Prussia at the different partitions, a new state, known as the Grand Duchy of Warsaw, and ruled by the King of Saxony as a constitutional monarch under the protection of Napoleon. The Niemen divided this new state from the portion of Poland under the rule of Russia (pp. 31, 255).
The new Grand Duchy had to furnish troops in aid of Napoleon. In 1808 the Polish light cavalry, led by Kozietulski, won glory by the capture of Somosierra, a defile leading to Madrid (p. 286).
In 1809, after a war with Austria, in which he received valuable aid from the Poles, Napoleon increased the Grand Duchy of Warsaw by lands taken from that country. Tardy and ungenerous though his action had been, he had thus done something to justify the hopes of the Poles that he would one day reconstitute their Commonwealth as a whole. Hence it will be clear with what enthusiasm Poland, and still more Lithuania, awaited the outcome of a great war between Napoleon and Russia, such as was evidently approaching in the year 1811. The Poles believed Napoleon to be unconquerable, and trusted that when he had defeated Russia he would proclaim the reunion of Lithuania with the Grand Duchy of Warsaw; then Poland would live once more (pp. 160, 277).
The actual outcome of the war was a crushing blow to Polish hopes. Napoleon's invasion of Russia resulted in his utter defeat; after his flight home his army was defeated at Leipzig (1813), where Prince Joseph Poniatowski met his death. Two years later, at the Congress of Vienna, the greater portion of Poland was given over to Russia, to be governed as a constitutional state. Such it remained, in name at least, until the desperate insurrection of 1831, the failure of which ended all pretence of Polish self-government under Russian rule. To drown the grief and despair with which that tragedy had filled his mind Mickiewicz turned back in the next year (when he began Pan Tadeusz) to the scenes of his childhood, to the days full of hope and joyful expectation that had preceded Napoleon's attack on Russia.]
1 In the time of the Polish Commonwealth the carrying out of judicial decrees was very difficult, in a country where the executive authorities had almost no police at their disposal, and where powerful citizens maintained household regiments, some of them, for example the Princes Radziwill, even armies of several thousand. So the plaintiff who had obtained a verdict in his favour had to apply for its execution to the knightly order, that is to the gentry, with whom rested also the executive power. Armed kinsmen, friends, and neighbours set out, verdict in hand, in company with the apparitor, and gained possession, often not without bloodshed,
