On 17 July, the ARSK and the VRS started a fresh effort to capture Bihać by expanding on gains made during Operation Spider. The move provided the HV with a chance to extend their territorial gains from Operation Winter '94 by advancing from the Livno valley. On 22 July, Tuđman and Bosnian President Alija Izetbegović signed the Split Agreement for mutual defence, permitting the large-scale deployment of the HV in Bosnia and Herzegovina. The HV and HVO responded quickly through Operation Summer '95 (), capturing Bosansko Grahovo and Glamoč on 28–29 July. The attack drew some ARSK units away from Bihać, but not as many as expected. However, it put the HV in an excellent position, as it isolated Knin from the Republika Srpska, as well as Yugoslavia.