All the details can be found on the HelloClan forum topic, the gathering officially starts in 2 hours from this article publish time but the mod will be hosted for the entire weekend and the objective (for tonight) is to play all of the levels available!
So in case you missed this I strongly suggest you to join the HelloClan discord server so that you can stay up to date not only with BFVietnam online gatherings (modded as well as vanilla fill the server events), but also on BF1942 / BF2 partner events that get cross-promoted.
