On This Day - What happened 1 July 1991 AD

The YPA's ammunition dump at Črni Vrh caught fire and was destroyed in a massive explosion, damaging much of the town.

More skirmishes took place, with Slovenian TO forces taking over a YPA facility at Nova vas, south of Ljubljana.

The Slovenians successfully captured depots at Pečovnik, Bukovžlak, and Zaloška Gorica, taking possession of some 70 truckloads of ammunition and explosives.

The YPA 306th Light Air Defense Artillery Regiment's column retreated from its exposed position at Medvedjek and headed into the Krakovo Forest (Krakovski gozd) near the Croatian border. It ran into a blockade near the town of Krško and was surrounded by Slovenian forces, but refused to surrender, probably hoping for help from a relief column.

the YPA's leadership sought permission to change the tempo of its operations. Defense Minister Veljko Kadijević informed the Yugoslav cabinet that the YPA's first plan – a limited operation to secure Slovenia's border crossings – had failed, and that it was time to put into operation the backup plan of a full-scale invasion and imposition of military rule in Slovenia. >>the collective presidency (Yogoslavia)– headed at the time by Serbia's Borisav Jović – refused to authorise such an operation. The YPA Chief of Staff, General Blagoje Adžić, was furious and publicly denounced "the federal organs [which] continually hampered us, demanding negotiations while they [the Slovenians] were attacking us with all means".

Nokia assisted in the development of the GSM mobile standard in the 1980s, and developed the first GSM network with Siemens, the predecessor to Nokia Siemens Network. The world's first GSM call was made by Finnish prime minister Harri Holkeri on 1 July 1991, using Nokia equipment on the 900 MHz band network built by Nokia and operated by Radiolinja.