If you are referring to: https://worldofwarships.com/en/news/sales-and-events/great-marinated-turkey-soup/
The missions are not gated; are are listed in the article:
These missions are not visible within the client, but automatically tracked on the back end.
The missions notated above refer to: https://worldofwarships.com/en/news/sales-and-events/june-missions-2019/#greatest-battles
You have not completed the 3 Citadel hits: