At the two Diets held by him, at Kassa and Talya, in 1683, the estates, though not uninfluenced by his personal charm, showed some want of confidence in him, fearing lest he might sacrifice the national independence to the Turkish alliance.
The first authentic pacta conventa made between the Polish nobility and the Crown dates from the compact of Kassa (September 17, 137 4), when Louis of Hungary agreed to exempt the szlachta from all taxation, except two Polish groschen per hide of land, and to compensate them for the expenses of all military service rendered beyond the confines of the realm.
By an agreement with the queen mother of Hungary at Kassa in 1383, the Poles finally accepted Jadwiga as their queen, and, on the 18th of February 1386, greatly against her will, the young princess, already betrothed to William of Austria, was wedded to Jagiello, grand duke of Lithuania, who had been crowned king of Poland at Cracow, three days previously, under the title of Wladislaus II.
Nevertheless he was not averse to a peace, nor to a preliminary suspension of hostilities, and negotiations were opened at Pressburg, Kassa and Beszterczebanya successively, but came to nothing because Bethlen insisted on including the Bohemians in the peace, whereupon (20th of August 1620) the estates of North Hungary elected him king.
Berro, ras of Gojam, in order to save himself, attempted to combine with Tigre, but his army was intercepted by Kassa and totally destroyed, himself being taken prisoner and executed (May 1854).
By increasing his dominions at the expense of the Gallas, he still further roused the jealousy of the northerners, and a treaty which he concluded with Ras Ali against Kassa in 1850 determined the latter to crush him at the earliest opportunity.
Shortly afterwards Kassa moved against Tigre, defeated Ubie's forces at Deragie, in Simen (February 1855), took their chief prisoner and proclaimed himself negus negusti of Ethiopia under the name of Theodore III.