From Greece to Finland: Russia-Ukraine war has crossed NATO border 83 times

A drone that struck a residential building in Romania over the weekend was the 83rd incident where military objects linked to the Russia-Ukraine war have entered NATO member airspace or territory. The incidents have occurred in countries ranging from Greece to Finland.

A drone linked to the Russia-Ukraine war struck a residential building in Romania over the weekend – this was already the 83rd time military activity has spread across NATO's borders. The incidents have concentrated particularly in member states bordering Ukraine, but isolated cases have been recorded far to the west and north.

Incidents across Europe

The incidents have occurred across a very wide geographical area – from Greece in the south to Finland in the north. Most involve drones or missile fragments that have strayed onto NATO territory from combat zones near Ukraine's border. Multiple incidents have been recorded in Romania, Poland and near the Baltic states.

NATO responds to mounting pressure

Each new incident increases pressure on NATO to clarify how the alliance responds when military activity physically affects member territory. So far, NATO countries have treated the incidents rather cautiously, avoiding escalation, but public debate over where the line of counter-attack obligation lies has become increasingly sharp.

The Romania incident has once again raised the question of how long the alliance can treat such incidents as coincidental or unintentional, and when they should be treated as a material attack within the meaning of NATO Article 5.