The Yugoslav army was ordered to invade Slovenia under the pretext of securing Yugoslavia's international border. Elements of the JNA's 13th Corps stationed in Rijeka and the 306th Anti-Aircraft regiment stationed in Karlovac, together with other forces totalling some 2,500 men, entered Slovenia early in June. This began what was later dubbed the Ten-Day War. The Slovenes learned of the JNA's advance from the Croats and began preparing to resist by erecting barricades.
The video describes several columns. One JNA armoured column crossed the border with Croatia near Metlika and moved toward southeastern Slovenia. Another moved from Varaždin toward the Austrian border. Simultaneously, a column of the 1st Armored Brigade stationed in Vrhnika barracks moved out to capture the Ljubljana airport. The Kučan government ordered the Slovenian army and Territorial Defense Units to resist. Battles took place around Metlika, Medvedjek and Ormož, where Slovenians harassed Yugoslav armour with anti-tank guns, and in the afternoon they shot down a helicopter carrying bread over Ljubljana to Yugoslav barracks.
The JNA had occupied many border crossings on the first day, so on the following day the Slovenians shifted from primarily blocking actions to attacking captured crossings and blockading JNA bases. Slovenian forces defeated a JNA unit in the Nova Gorica border area, capturing three of its T-55 tanks, and another heavy battle took place at the Holmec border crossing. The video notes that many Yugoslav servicemen started to desert or refuse to fight, since the JNA was still a multinational force that included Slovenians. The JNA used its air superiority to bomb airports, Slovenian military installations, barricades, and radio and television transmitters. While this had limited military impact, the Slovenian forces isolated Yugoslav units scattered across the border crossings, worsening their supply situation. At Vrtojba a JNA unit surrendered, leaving several tanks to the Slovene army.