After intense artillery preparation lasting until 4 o'clock in the afternoon, infantry of the Seventh Italian Army Corps vigorously attacked and carried the network of trenches extending from the mouth of the Timavo River to a point east of Jamiano and took possession of the heights between Flondar and Medeazza.

On May 26, 1917, artillery action all along the line continued fiercely from sunrise until evening. In the afternoon between the coast and Jamiano Italian infantry by a brilliant assault succeeded in reaching a point beyond the railway from Monfalcone to Duino, northeast of San Giovanni, and carried the strongly fortified Hill 145 southwest of Medeazza.