A NATO commander says training Ukrainian soldiers is showing his forces that skills neglected after the Cold War matter again

Ukraine is fighting a fierce electronic warfare battle to keep its drones and communications working while frustrating Russia's, and it's showing allies that they need to focus on it.

Ukrinform/NurPhoto via Getty Images Norway is leading new international training for Ukrainian troops to boost battlefield skills.

The training is also giving Norway lessons on modern war to bring back to its own military.

That includes rebuilding electronic warfare capabilities neglected since the Cold War.

Training Ukrainian troops for war with Russia has reminded Western trainers of the importance of electronic warfare, a key skill that has received less emphasis since the end of the Cold War but is proving to be increasingly important in modern combat.

Norway is leading a new multinational training effort on NATO soil to prepare Ukrainian troops to fight .

The trainers are sharing Western practices but also learning lessons from participating Ukrainian soldiers, who bring valuable battle-won experience in areas such as electronic and drone warfare.

Training Ukrainian soldiers is one way that partner nations can bring lessons from the war back to their own militaries, Brig.

Gen.

Atle Molde, the commander overseeing Task Force Legio, told Business Insider.

He said that Camp Jomsborg, the purpose-built training camp that BI visited in Poland, "is one of several, but maybe the most important sensor for information." One of the lessons Norway is taking from the collaboration, he said, is the renewed importance of electronic warfare capabilities.

Electronic warfare was something in which "the West or NATO and the Western force had quite some capacity back in the Cold War era," Molde said.

"But after the fall of the Soviet Union, end of the Cold War, when we moved into counterinsurgency and stuff like that, all that went away." Now, he said, the West needs "to rebuild that." Part of the war in Ukraine is a fierce electronic warfare battle .

Both sides are trying to detect, jam, and disrupt the other side's communications, drones, navigation, and sensors.