Complex sentence: This operation, faced with opposition from Ante Pavelić and a cautious Italian high command, was nearly cancelled, but after Jevđević and Trifunović-Birčanin promised to cooperate with Croat and Muslim anti-Partisan units, the operation went ahead, with less Chetnik involvement.
Split into simpler sentences: This operation, faced with opposition from Ante Pavelić and a cautious Italian high command, was nearly cancelled. However, after Jevđević and Trifunović-Birčanin promised to cooperate with Croat and Muslim anti-Partisan units, the operation went ahead but with less Chetnik involvement.