All you want to know about B12 anniversary
Article that summarize all links and info
https://www.erepublik.com/en/article/12th-anniversary-challenge-rewards-day-0-2707884/1/20
https://www.erepublik.com/en/article/the-prizes-map-2707982
https://i.imgur.com/n2mUpXE.png
Update: