In earlier days——
The ‘Moscow signal’ experiments by the USSR were conducted during the Cold War between 1953 and 1976. The USSR reportedly irradiated the US embassy with a 2.5 – 4 GHz microwave beam with a maximum reported exposure of 15 μW/cm2 for 18 hours a day. (Lilienfeld et al., 1978).
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Soviet Halts Microwaves Aimed at U.S. Embassy
The New York Times
May 30, 1979 — The Soviet Union has stopped bombarding the American Embassy with microwaves, an embassy spokesman said today.
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even NPR admits it so it must be true....
https://www.npr.org/2021/10/21/1047342593/long-before-havana-syndrome-u-s-reported-microwaves-beamed-at-an-embassy