Władysław Jagiełło and Witold Kiejstutowicz were preparing a war with the Teutonic Order. It was decided to build a bridge across the Vistula near Czerwińsk. The wood for building about 50 riverboats (punts) and spans had to dry for several months. The works which started in February 1409 in the Kozienice Forest were coordinated by Master Jarosław and Staroste Dobrogost the Black. Teams of boatbuilders, carpenters, blacksmiths and raftsmen made the elements of the bridge (boats, spans, anchors, iron buckles). The bridge was erected between Śladow and Czerwińsk on June 28-30, 1410. The barriers on the banks and the military forces ensured an uninterrupted march of the Polish army on June 30-July 3, comprising approx. 15,000 mounted knights, several hundred heavy tabor wagons, and several dozen cannons. The combined Polish and Lithuanian-Ruthenian armies departed from Czerwińsk for the war with the Teutonic Order. The bridge was dismantled, floated to Płock and rebuilt on the Vistula near Przypust on September 24-27, 1410 for the returning Polish army.