The first action took place on 8 June 1915 when Italian batteries on Monte Padon and Col Toront bombarded the La Corte and Tre Sassi forts as well as Austrian infantry positions. The attack was repeated a week later, and expanded to strike at Livinallongo del Col di Lana. If the assault had begun earlier the weak Austrian presence might have been easily dislodged, but between May and a June the Austrians had fortified the Costone di Salesei and the Costone di Agai, meaning that it would take a frontal attack on Col de Lana to push them out.: On 15 June, some Italian patrols sent towards the enemy positions were easily neutralized, and this was followed by series of bloody frontal attacks that achieved nothing.: The Italians launched ten further attacks against Col di Lana and five against the adjoining Mount Sief until General Rossi called a halt on 20 July to await reinforcements.: