In late 1962, due to the growing Cuban Missile Crisis, the Eastern Bloc and the Western Bloc stood on the brink of war. Under Soviet pressure, the Polish authorities decided to organize huge military exercises in northwest Poland, in the area of Szczecin. The exercises were observed by Marshal of the Soviet Union Andrei Grechko as well as several Polish officials, including Władysław Gomułka and Marian Spychalski. The parade in Szczecin was to be the finale of the maneuvers.

On 9 October 1962, the main streets in the center of Szczecin were closed to traffic. Inhabitants of the city crowded the sidewalks, curious to see tanks and equipment of the three allied armies: the Polish People's Army, the Soviet Army, and the National People's Army (NVA). Tens of thousands of people, including children, gathered along Szczecin’s main arteries of Aleja Wojska Polskiego, Aleja Piastów and Aleja Kościuszki. The event had been widely promoted, and schoolchildren were told to describe the parade as their homework. Students of all schools were allowed to go home early, so that they could spectate. Many children were standing on the curbs as close to the tanks and other weapons as possible.

City authorities adorned streets with flags of Poland, Soviet Union and East Germany; in schools flowers had been given to children, who were told to wave them at soldiers. Newspapers headlines told readers that they would witness "A parade of our might", "A symbol of brotherhood in arms that serves the peace" and that "Polish Szczecin welcomes allied forces".^{[citation needed]}

The parade was seen by the Warsaw Pact planners as a show of strength of its forces. It had been very carefully prepared, and Marshal Grechko wanted to present some of the best and most advanced weapons possessed by the Pact in 1962. Thus, spectators had a chance to see cannons, mortars, armored personnel carriers, howitzers and tanks. Above the city a few heavy Mi-6 helicopters flew and warships of the Soviet Navy lay moored in the port.

First, tanks and weapons of the NVA appeared, followed by Soviet tanks, and finally Polish units. Among them were 14 tanks of the 5th Armored Division [pl] from Slubice. Crowds of people, adults and children alike, came closer and closer to the vehicles, not listening to the militsiya, who were telling them to move back.

It is not known why a T-54 tank (marked with number 0165) of the Polish Army ran into a group of children, standing either on the sidewalk by the Aleja Piastow street, or on the street itself (sources vary on this matter). All documents describing this incident were destroyed in March 1982 and all information about the tragedy was suppressed. It is possible that the tank, which was the last one in line, drove too fast or skidded on the slippery road.^{[citation needed]} The tank, weighing 36 tons, was traveling at a speed of some 30 km/h.^{[citation needed]}

Altogether, seven children died. Four of them were students of Szczecin’s Elementary number 1; in 2006 a tablet commemorating the tragedy was placed by the entrance to the school. The children who died were aged from 6 to 12 years. Also an additional 21 persons, including several more children, were injured, some of them permanently. After the incident, panic broke out in the crowd, as a result of which 22 persons were injured.

The communist authorities expunged any information about the event and it was not reported in the Polish mass media. A local daily Glos Szczecinski placed a small notice on 10 October stating that seven children died during a parade. Families of the dead children were told to not discuss the topic with anyone.

Hundreds of witnesses were later called by the military prosecutor's office. All were told that the incident was classified and that revealing it would mean imprisonment. At the same time, the trial of the tank’s crew was dismissed, as, according to the military court, the tank had not crossed the curb. All hospital documents connected with the event were confiscated by the military, never to be returned. However, it was impossible to completely suppress news of the event, as too many people had witnessed it. By mid-October 1962 rumors of a high death toll were rife in Szczecin.^{[citation needed]}

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• Polska.pl
• East News
• Gazeta.pl

53°25′55″N 14°32′20″E / 53.43194°N 14.53889°E / 53.43194; 14.53889