Ehasa ry is a Finnish association whose purpose is to organize large airsoft events.

We organize annually battlegroup and conquest events

Check all our events

TSTOS 17

TSTOS 20

TSTOS 19

BATTLEGROUP 2025

BATTLEGROUP 25 will be held on July 23 - 26, 2025 in a Halli training area in Finland. It is the biggest Milsim airsoft event in Finland with more than 650 players attending around the Europe.

battlegroup.ehasa.org

What is Ehasa ry?

Ehasa Ry is an association operating in the capital region, whose purpose is to organize annual airsoft events in Finland. Ehasa consists of about fifteen active members.

We are currently organizing the biggest events in Finland, and many enthusiasts of the sport know the reputation of Ehasa and have participated at least in one of our events. The cornerstone of our association is fast and active customer service, feedback-responsive event development, and ambition to always make events better for all of our participants.

What do we do?

We organise

Events

We generally organize two or three large airsoft events every year. Our annual main event is the international TSTOS milsim event lasting several days. TSTOS is usually attended in total by more than 700 people each year from several different countries.

List of events

We maintain

SERVICES

We maintain numerous services that help our players and also other event organizers. The most famous of these is Kuulaportti, which is a free service for players to attend events and an excellent tool for game organizers in managing events.

List of services

We have

FUN

We have been organizing events with our core team since 2010, and during that time we have also learned to have fun. We also like to enjoy the results of our hard-earned voluntary work by organizing various game trips and other entertainment among our members.

Our social media