India, Oct. 27 -- Iranian-backed militias carried out a precision strike last month, hitting the pumping stations of Saudi Arabia's most important oil pipeline. Days later, another attack hit a Saudi military air base, damaging an Italian fighter jet inside a hangar.

Crucial to the strikes' success was what was happening in the skies overhead: For days beforehand, a constellation of Russian spy satellites converged over the pipeline and the air base to gather intelligence.

A private geospatial intelligence firm said it examined 40 missile and drone attacks against Saudi Arabia by Iranian-backed Houthi rebels in Yemen and militias in Iraq between July 1 and October 19. In every case, the firm found the same pattern of Russian Government ...