CAMP GRAYLING, Mich.—In modern warfare, battles are not only fought with rifles, tanks and artillery. Some of the most decisive victories are won across the electromagnetic spectrum.

At Northern Strike, the National Guard’s premier readiness exercise held this month at Michigan’s National All-Domain Warfighting Center, Soldiers trained in a high-intensity environment that pushed the limits of electromagnetic warfare, or EW. It tested their skills in realistic combat scenarios.

In classrooms, electromagnetic warfare specialists often train to disrupt, or “jam,” enemy communications, intercept signals and scan for threats. Jamming works by overpowering or confusing an enemy’s radio or data transmissions, preventing them from communicating or coordinating effectively.

Last year at Northern

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