noun, feminine/ɔ.pe.ʁa.sjɔ̃ mi.li.tɛʁ spe.sjal/plural: opérations militaire spéciales
special military operation (military campaign resembling a war; especially the 2022 Russian invasion of Ukraine)
Calque of Russian специа́льная вое́нная опера́ция (speciálʹnaja vojénnaja operácija).