Over 400 players have now registered for Battlegroup 20 event. Finnish government has eased restrictions on events and over 500-person outdoor events are allowed. Quarantine is not needed if you come from: Norway, Denmark, Iceland, Estonia, Latvia, Liettua, Netherlands, Andorra, Belgium, Ireland, Italy, Austria, Greece, Kypros, Liechtenstein, Matla, German, San Marino, Slovakia, Slovenia, Switzerland, Hungary or Vatican.
Any other way covid-19 will not affect the event. You can register without any worries.