In the course of 1496 John collected an army of 80,000 men in Poland with great difficulty, but the Poles entered Moldavia not as friends but as foes, and after the abortive siege of Suceava were compelled to retreat following defeat at the Battle of the Cosmin Forest. The insubordination of the "szlachta" seems to have been one cause of this disgraceful collapse, for John after his return confiscated hundreds of their estates.