Oscar Zero: The final Minuteman missile base that outlasted the Cold War

Wing VI’s Nuclear Arsenal in North Dakota

North Dakota hid America’s nuclear teeth during the Cold War.

In 1963, the Pentagon picked Grand Forks as home for Wing VI, the last Minuteman missile wing ever built. Unlike earlier wings, this one used Sylvania systems with bigger underground bunkers and tougher buildings.

Construction faced major setbacks when spring floods in 1965 damaged vital equipment. Still, by December 1966, all 150 missiles stood ready.

For over thirty years, crews at sites like Oscar Zero kept watch, until the 1998 deactivation left just one site standing.

Today, Oscar Zero remains the only preserved launch facility where you can see the massive six-ton blast doors that once guarded our nuclear arsenal.

The Pentagon Hunted for the Perfect Missile Base Location

The Department of Defense started looking for "Wing VI" sites in January 1961. Military teams checked out 6,500 square miles around Grand Forks, North Dakota.

They picked Grand Forks in February 1963 because its northern location could stop Soviet missiles coming over the North Pole.

The area already had an Air Force base and a SAGE blockhouse for headquarters, making it perfect for America’s newest nuclear weapons.

Sylvania Beat Boeing for the Missile Control Centers

Morrison-Knudsen and Associates won the main construction contract with a $128 million bid in February 1963.

For the first time, Sylvania Electronic Systems got the job to build the Launch Control Centers instead of Boeing. Sylvania built bigger underground bunkers than earlier Minuteman wings.

They also changed how sites were named, with each facility ending in zero rather than one. Workers started digging the first missile silos in March 1963 across an area as big as New Jersey.

Cold War Crews Trained While Construction Continued

The 321st Strategic Missile Wing started on November 1, 1964, as America’s sixth and final Minuteman wing.

Military staff showed up at Grand Forks for training while construction teams kept working on the 150 planned missile silos. By March 1965, the wing set up shop in the old SAGE blockhouse called Building 306.

The Air Force created three missile squadrons: the 446th, 447th, and 448th. Launch crews went to Vandenberg Air Force Base in California to learn how to use the weapons.

North Dakota Floods Nearly Sank the Project

Winter and spring floods in 1964-1965 turned the construction site into a muddy mess and caused big delays. Water damaged key parts like diesel generators, which workers sent back to factories for fixes.

Construction teams fought through harsh North Dakota weather to keep going. The flooding made digging work nearly impossible as underground rooms filled with water.

The schedule got pushed back, but workers kept building the 15 launch control facilities needed to run the missile network.

First Missiles Arrived by Train and Plane

Grand Forks got its first Minuteman II missile in August 1965 when it came by train from Hill Air Force Base. Assembly Plant 77 in Utah shipped all the missile parts.

In March 1966, the base made history with the first Minuteman missile delivery by airplane. Moving the 60-foot tall missiles across the plains created huge shipping challenges for the military.

These delivery methods became the standard way America moved its ICBMs.

Double Backup Systems Could Survive Nuclear War

The Sylvania system included double backup "Deuce" communication to make sure launch orders got through no matter what. A tough cable system ran underground with radio as backup.

Launch sites got stronger equipment buildings than earlier wings.

Medium Frequency antennas buried underground at both control and launch sites stayed safe from attack. The whole network could keep working even after nuclear bombs hit nearby.

Missile Crews Took Control of 50 Nuclear Weapons

The 447th Strategic Missile Squadron went live on April 25, 1966, with 50 Minuteman II missiles ready to launch. More missile groups came online throughout 1966 in a step-by-step process.

Each squadron ran 50 missiles through five launch control centers spread across the prairie. Launch officers worked in underground bunkers where they could fire missiles if ordered.

The wing kept 24-hour alert status, with crews ready to carry out war orders at a moment’s notice.

America Completed Its 1,000-Missile Force

On December 7, 1966, the 321st Strategic Missile Wing reached fully ready status with all 150 missiles set for war. All three squadrons became completely capable, finishing America’s planned nuclear missile force.

Wing VI marked the final piece in the Minuteman setup, completing the 1,000-missile force across the country. The Air Force started Project Long Life II testing, using changed missiles to check how well they worked.

Strategic Air Command had finally built its complete Minuteman ICBM network across the United States.

Three Warheads Replaced One on Each Missile

From December 1971 to March 1973, the wing swapped its Minuteman II missiles for newer Minuteman III models. These advanced missiles could hit three different targets instead of just one.

This upgrade gave the wing more nuclear firepower without adding more missiles.

The NS-20 Missile Guidance System replaced older guidance technology, making the missiles more accurate. The wing kept its 150 missiles but gained much more targeting flexibility.

Bunkers Got Tougher to Withstand Nuclear Blasts

In August 1975, the Wing Six Integrated Program brought major upgrades to the missile facilities. Engineers improved the missile suspension systems so they could survive bigger nuclear blasts nearby.

The Air Force added remote targeting capability, letting commanders change targets without visiting the silos. Silo upgrades made the whole system more likely to survive in a nuclear war environment.

Security and maintenance procedures kept getting better through the 1980s and 1990s as the Cold War continued.

Peace Treaties Turned Missile Silos into Rubble

In March 1995, the Base Realignment and Closure Commission picked the 321st for shutdown as the Cold War ended. The Strategic Arms Reduction Treaty with Russia required the elimination of Wing VI facilities.

The Air Force inactivated the wing on September 30, 1998, and transferred remaining missiles to Malmstrom Air Force Base.

Workers started blowing up the silos in October 1999 and finished in August 2001 with the last US START treaty implosion.

Only Oscar Zero survived, preserved as the Ronald Reagan Minuteman Missile Site for future generations to learn about the Cold War.

Visiting Oscar Zero Missile Alert Facility, North Dakota

You can visit Oscar Zero Missile Alert Facility at 555 113½ Ave NE, four miles north of Cooperstown on Highway 45.

The site is open Memorial Day through Labor Day daily 9am-5pm, and April through Memorial Weekend Tuesday-Saturday. November through March requires appointments only with credit card or check payment.

Tours take maximum 15 people down 50 feet underground to the Launch Control Center via freight elevator to explore this Cold War-era facility.

This article was created with AI assistance and human editing.

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