UK considered courting Yugoslavia into the newly formed NATO. This however changed in 1953 with the Trieste crisis, a tense dispute between Yugoslavia and the Western Allies over the eventual Yugoslav-Italian border (see Free Territory of Trieste), and with Yugoslav-Soviet reconciliation in 1956. This ambivalent position at the start of the Cold War matured into the non-aligned foreign policy which Yugoslavia actively espoused until its dissolution. Atrocities The Partisans massacred civilians during and after the war. On 27 July 1941, Partisan-led units massacred around 100 Croat civilians in Bosansko Grahovo and 300 in Trubar during the Drvar uprising against the NDH. Between 5–8 September 1941, some 1,000-3,000 Muslim civilians and soldiers, including 100 Croats were massacred by the Partisan Drvar Brigade. A number of Partisan units, and the local population in some areas, engaged in mass murder in the immediate postwar period against POWs and other perceived Axis sympathizers, collaborators, and/or fascists along with their relatives, including children. These infamous massacres include the Foibe massacres, Tezno massacre, Macelj massacre, Kočevski Rog massacre, Barbara Pit massacre and the communist purges in Serbia in 1944–45. The Bleiburg repatriations of retreating columns of the Armed Forces of the Independent State of Croatia, Chetnik and Slovene Home Guard troops, thousands of civilians heading or retreating towards Austria to surrender to western Allied forces, resulted in mass executions. The "foibe massacres" draw their name from the "foibe" pits in which Croatian Partisans of the 8th Dalmatian Corps (often along with groups of angry civilian locals) shot Italian fascists, and suspected collaborationists and/or separatists. According to a mixed Slovene-Italian historical commission established in 1993, which investigated only on what happened in places included in present-day Italy and Slovenia, the killings seemed to proceed from endeavors to remove persons linked with fascism (regardless of their personal responsibility), and endeavors to carry out mass executions of real, potential or only alleged opponents of the communist government. The 1944-1945 killings in Bačka were similar in nature and entailed the killing of suspected Hungarian, German and Serbian fascists, and their suspected affiliates, without regard to their personal responsibility. During this purge, a large number of civilians from the associated ethnic group were also killed. The Partisans did not have an official agenda of liquidating their enemies and their cardinal ideal was the "brotherhood and unity" of all Yugoslav nations (the phrase became the motto for the new Yugoslavia). The country