Place a spy in an any enemy barracks for veteran (one stripe) men, or in any enemy war factory for veteran tanks etc. Place one in an enemy Allied battle lab for a chrono commando (has a rapid fire machine gun and explosives like Tanya). Place one in any Soviet battle lab for a Psi commando (controls units like a yuri, has explosives like Tanya) Having infiltrated battle labs, if you capture (or already have) a Soviet barracks, you can now buy one Yuri prime (two with cloning vats) with a long range for controlling people, and a chrono Ivan (just like Crazy Ivan, but chronoshifts). Place a spy in an enemy power plant to knock out their power for a while. Place one in an enemy radar of airforce command centre to bring down their radar.