 Nyora kupfuurira kweiyi ndima - Pashure peTehran Conference, maPartizans akagamuchira kuzivikanwa zviri pamutemo sesimba rechokwadi rerusununguko rwenyika neAllies, avo vakazogadzira Balkan Air Force pasi pesimba uye zano raBrigadier Fitzroy Maclean nechinangwa chekupa kuwedzera kwezvinhu uye rutsigiro rwemhepo kune maPartizans. Muna February 1944, maChetnik aMihailovic akakundikana kuzadzisa zvido zveBritain zvokuputsa mabhiriji akakosha pamusoro penzizi dzeMorava neIbar, zvichiita kuti maBritish abvise vanobatana navo uye varege kupa maChetnik. Kunyange zvazvo rutsigiro rweBritain nokuda kwevaChetnik rwakaguma, vaAmerica vakanga vasinganyanyi kufarira kusiya kweBritain vaChetnik vaipesana nemakomonisiti. Sezvo rutsigiro rwakashandurwa kuenda kumaPartizans, maChetniks aMihailović vakaedza kutangazve rutsigiro rweAllied kumaChetniks nekuratidzira kushingairira kwavo kubatsira maAllies. Kushingairira uku kubetsera kwakaiswa mukuita apo Hofisi yeStrategic Services OSS yakasvika Chetniks yaMihailovic pakati pa1944 kuronga kutakurwa nendege kwevafambisi vendege veUS vakadonhedzwa. Iri basa rinozivikanwa seHalyard Mission rakaguma nokununurwa kwevafambisi vendege veUS 417 avo vaichengetwa vakachengeteka naMihailovics Chetniks. Mihailović gare gare akagamuchira Legion of Merit kubva kuMutungamiri weUnited States Harry S. Truman nokuda kwekununurwa kwevatyairi veAllied. 