I want to know the answer to the following question:
Besides improved tactics and training, what did Wenger add to the Arsenal team?
All the background I'm provided with is that "In addition, the club reached the final of the 1999–2000 UEFA Cup (losing on penalties to Galatasaray), were victorious in the 2003 and 2005 FA Cups, and won the Premier League in 2003–04 without losing a single match, an achievement which earned the side the nickname "The Invincibles".". Is that enough to answer the question?
Answer: no