Electronic warfare changes what a force can hear, detect, transmit or trust by exploiting electromagnetic energy. A jammer can disrupt a link, a deceptive signal can mislead a receiver, and a listening system can reveal an emitter without firing a weapon. These are different activities, and evidence of one does not automatically establish the others.
NATO's explanation of electromagnetic warfare covers both situational awareness and offensive or defensive effects. NATO now prefers "electromagnetic warfare," although "electronic warfare" remains widely used. The broader label helps explain why the subject extends beyond drones to radars, communications, navigation and other military systems.
Electronic support begins with finding emissions
Electronic support is the listening and identification part of the problem. The US Army's Operational Law Handbook describes tasks that include searching for, intercepting, identifying and locating electromagnetic emissions for immediate threat recognition, targeting and operational planning.
Consider a generic radar detected by a receiver. The useful result might be a warning that a threat is present, an identification of its likely type or a location estimate. Those are separate findings: detecting a transmission does not, by itself, prove that the analyst knows the emitter's exact position or the intentions of its operator.
This is why a report that a force "detected enemy communications" needs a careful reading. Reception, identification and comprehension are not synonyms. A public statement may confirm that a signal was found while revealing nothing about whether the message was understood or whether the observation changed a military decision.
Electronic support can also contribute to later action: the same handbook places attack, protection and support within a common framework. Listening provides information; commanders still have to decide what that information supports. A detected emitter is not automatically a confirmed target engaged or destroyed.
Jamming denies a signal, spoofing offers a false one
Jamming interferes with a receiver's ability to use a signal. For satellite navigation, the European Union Aviation Safety Agency's safety bulletin describes interference that prevents receivers from properly acquiring satellite signals. Spoofing instead introduces counterfeit signals that can produce an incorrect position, navigation solution or time.
The distinction is practical: an obvious outage tells an operator that information is missing. A plausible false position can leave the system apparently functional while undermining the decision based on it. The agency cautions that crews may not immediately recognize which type of interference they are experiencing.
Navigation interference is one part of electronic warfare, covered in more detail in the guide to GNSS jamming and spoofing. It should not become a universal explanation for every failed drone or lost communication. The affected function, the receiver and the observed behavior have to match the claimed mechanism.
Nor is electronic warfare identical to hacking. NATO distinguishes spectrum-based effects from cyber operations, while acknowledging that interference with infrastructure can affect computer-dependent activity. A lost radio connection alone does not establish that software was penetrated.
Protection must preserve the force's own access
Electronic protection addresses the other half of the contest: keeping friendly personnel and equipment effective despite electromagnetic effects. The Army handbook's definition includes effects caused by friendly systems as well as adversaries. A force can therefore create problems for itself while trying to disrupt an opponent.
The operational question is wider than whether a jammer is powerful: can friendly systems still communicate and navigate when it operates? Is a disruption temporary, and does service recover? These questions connect the advertised capability to the task the force must complete.
NATO says its exercises use simulated threats and electronic defenses to identify gaps and shape recommendations. Such testing can demonstrate performance under stated conditions. It does not turn every advertised range or claimed success into a battlefield result, particularly when the public account omits the target configuration and the trial conditions.
Current examples show testing and measured consequences
From 9 to 13 March 2026, NATO's innovation range at Latvia's Selija Military Training Area ran its first uncrewed-aircraft and counter-drone testing campaign. NATO's announcement said the site supported electronic warfare testing in an open environment alongside high-speed and high-altitude interceptor flights.
The announcement documents a place, dates and a testing activity; it does not publish a comparative success rate for the electronic warfare systems. The appropriate conclusion is that testing occurred, with military users, government representatives and industry involved, rather than that a particular system defeated every relevant threat. That distinction also matters when assessing counter-drone claims.
A different kind of evidence appeared on 3 July 2026, when EASA updated its navigation-interference bulletin following analysis of recent occurrences. The document, editorially corrected on 22 July 2026, records effects including rerouting and diversions and warns that the severity depends on circumstances and system dependence.
This is evidence of operational consequences, but it is not automatic attribution to a named military unit. The joint EASA and EUROCONTROL plan published on 26 March 2026 calls for shared monitoring, investigation and better reporting to build a validated picture. Observing interference and establishing who caused it remain separate tasks.
A credible claim connects the mechanism to the mission
When reading a claim of military effectiveness, look for three connected elements: the function affected, the observed result and the consequence for the mission. A temporary link outage, a false navigation solution and an aircraft destroyed are materially different outcomes.
Confidence grows when a dated test or incident identifies what was measured and which alternatives were considered. It falls when a broad claim offers only a product name and a percentage without a defined denominator. Electronic warfare can have significant effects while leaving little visible damage; that makes precise evidence more necessary, not less.