Simplify the following text for a Grade 8 native English-speaking person.
Original: In 1244 a law was made which said that every merchant who sailed a boat down the Danube past KomÃ rno had to stop for several days in KomÃ rno and unload all the cargo so that people could buy it if they wanted .
Simplified: After the WW II the territory on the north bank of the Danube became part of Czechoslovakia again and the town name was changed to KomÃ rno . After the war , large-scale reconstruction of KomÃ rno 's industries began .