During a military exercise in Sweden involving NATO forces, Ukrainian drone pilots pushed their hosts to the red line. Their message was sharp, with no diplomatic wrapping: „In a real war, you'd all be dead by now".

The scene is simple, but the message is complex. Sweden - which has become a NATO member in the last two years, and which is worried about Russian pressure on the island of Gotland in the Baltic - called in Ukrainian drone pilots as advisers. They have three years of frontline experience in a war where drones have redefined warfare.

The result? A Ukrainian pilot using the call sign Tarik said Swedish soldiers needed significant tactical improvements. NATO's three-year „purely academic" training approach turned out to be insufficient. „Three times we had to interrupt the training so the soldiers could understand what to correct", he said. A scenario in which the adviser has to stop the lesson to tell the students they're getting the basics wrong.

His colleague with the call sign Karat went even further. According to him, Western forces have to urgently understand modern warfare doctrine. Not next year. Not the next five-year plan. Urgently. Because the drones Ukraine uses today are at a level NATO as an institution still doesn't apply.

The exercise took place in a context Sweden can't avoid. The trend in American policy under Trump - reducing US troop presence in Europe, a smaller NATO budget, a more accommodating tone toward China and Iran - means Sweden has to lean on its regional capabilities. And those capabilities, as the pilots described, are not at the level required.

For the Balkans this is an instructive picture in two senses. First - NATO as an institution has outdated training. The Macedonian, Montenegrin and Albanian armies get the same training. That's no cause for panic, but it's no cause for confidence either. The doctrine taught at training grounds in Germany, Poland and Bulgaria is the same doctrine the Ukrainians experienced and then left behind.

Second - Gotland. That's the island whose control could decide the Baltic war. Whoever controls Gotland controls the energy bridge between Russia and Europe. Sweden knows this. That's why it called in the Ukrainians. But the Balkans still don't have their own Gotland in training plans. Nobody expects to be attacked right away - but nobody is prepared for it either.

When a Ukrainian pilot says „in a real war you'd all be dead", it isn't a breach of diplomatic tone. It's a reality that should be a wake-up call for Macedonian, Serbian, Croatian and Albanian commanders. Not for panic. For repair.