[Someone]

After 2004, where Germany didn’t get through the group stage in the European championships, they realized they had become complacent, and started a project to focus on footballing technique throughout all their teams.

That turned their national side from a strong team into a strong team where all players have good technical skills.

2014 is where this led to the first great success (https://www.bundesliga.com/en/news/Bundesliga/confederations...), but they only could play like that because of that decade long process.