Soviet T-62 tanks and BMP-1 infantry fighting vehicles of the 40th Army moved through the streets of Kabul on December 27, 1979. They had crossed the Amu Darya river two days prior. Their official mission was to uphold the Treaty of Friendship with Afghanistan and support the beleaguered communist government of Hafizullah Amin. Within hours, Soviet Spetsnaz troops stormed the Tajbeg Palace. They killed Amin and installed a more pliable leader, Babrak Karmal. The Politburo in Moscow called it a limited contingent. It was an invasion.
The decision followed months of internal debate. Soviet intelligence reports warned that Amin’s regime was collapsing and might align with the West. Leonid Brezhnev and a narrow majority of the Politburo authorized Operation Storm-333 to secure a compliant buffer state. They anticipated a swift stabilization. They misjudged completely. The occupation triggered immediate, widespread armed resistance from Afghan mujahideen, who received covert funding and weapons from the United States, Saudi Arabia, and Pakistan. The terrain and culture favored guerrilla warfare.
This event is frequently framed as the start of the Afghan War. It is more accurately the point of Soviet failure to manage a client state through proxy forces. The direct insertion of over 100,000 troops transformed a civil conflict into a national anti-colonial war and a proxy battleground for the Cold War. The nine-year occupation cost the Soviets approximately 15,000 dead and shattered the myth of Soviet military invincibility. It drained economic resources and contributed to domestic disillusionment that helped precipitate the collapse of the USSR. The vacuum left by their withdrawal in 1989 set the stage for decades of continued conflict.