and pic rel.   > because, first off, lithuania had only 1/3 of poland's population and thus poland was also much more urbanized. > secondly, this meant poland had more manpower and a larger economy with cash to put forward towards war. > thirdly, poland christianized itself (by bohemia) in 966, lithuania was christianized by poland in 1387, which resulted in poland having much more developed institutions (that based on centuries old knowledge of roman law in latin and greek philosophy), and one of the oldest universities in europe (academy of krakw aka jagiellon university) that spread its polish influence in the region. p.s. after the union of lublin, the crown of the kingdom of poland got southern lands of the grand duchy of lithuania transferred to the crown.  
DEUS VULT