Russia at length, having made peace with the Turks, prepared to throw her sword into the scale. A formidable opposition to the measures of the Diet had arisen, even among the Poles themselves, and occasioned what was called the confederation of Targowicz, to which the Empress of Russia promised her assistance. The feeble Stanislas, who had proclaimed the new constitution in 1791, bound himself in 1792 to sanction the Diet of Grodno, which restored the ancient constitution, with all its vices and all its abuses. In the meanwhile Frederick William, King of Prussia, who had so mainly contributed to excite the Poles to their enterprises, basely deserted them, and refused to give them any assistance. On the contrary, he stood aloof from the contest, waiting for that share of the spoil which the haughty empress of the north might think proper to allot to him, as a reward of his non-interference. But though thus betrayed on all sides, the Poles were not disposed to submit without a struggle. They flew to arms, and found in the nephew of their king, the Prince Joseph Poniatowski, a general worthy to conduct so glorious a cause. Under his command Kosciusko first became known in European warfare. He distinguished himself in the battle of Zielenec, and still more in that of Dubienska, which took place on June 18, 1792. Upon this latter occasion he defended for six hours, with only 4,000 men, against 15,000 Russians, a post which had been slightly fortified in twenty-four hours, and at last retired with inconsiderable loss. But the contest was too unequal to last; the patriots were overwhelmed by enemies from without, and betrayed by traitors within, at the head of whom was their own sovereign. The Russians took possession of the country, and proceeded to appropriate those portions of Lithuania and Volhynia which suited their convenience; while Prussia, the friendly Prussia, invaded another part of the kingdom. Under these circumstances the most distinguished officers in the Polish army retired from the service, and of this number was Kosciusko. Miserable at the fate of his unhappy country, and at the same time an object of suspicion to the ruling powers, he left his native land and retired to Leipsic, where he received intelligence of the honor which had been conferred upon him by the Legislative Assembly of France, who had invested him with the quality of a French citizen. But his fellow-countrymen were still anxious to make another struggle for independence, and they unanimously selected Kosciusko as their chief and generalissimo. He obeyed the call, and found the patriots eager to combat under his orders. Even the noble Joseph Poniatowski, who had previously commanded in chief, returned from France, whither he had retired, and received from the hands of Kosciusko the charge of a portion of his army.