LEGO released a number of train sets under the World City theme from 2003 to 2004. A total of eleven sets were released, three of them being promotional polybag sets containing just minifigures. The trains in the World City theme were white with a green stripe and were both passenger and cargo trains.
2003 LEGO Sets
While 2003 proved to be a financial disaster for LEGO we did see a number of signification events that set the tone for future LEGO recovery and investments. Most important, LEGO introduced new realistic minifigure skin tones that affected licensed themes including Star Wars, Harry Potter, Basketball, Ferrari and Spider-Man, but kept yellow skin tones for all other minifigures. In 2003, the LEGO minifigure celebrated its 25th birthday with just under four billion minifigures being produced. LEGO that year introduced a number of new themes including Clikits, Designer, Sports which consisted of hokey, basketball and Gravity Games, World City and 4 Juniors which replaced the Jack Stone theme.