Westerling's operation, which started in December 1946 and ended in February 1947, succeeded in eliminating the insurgency and undermining local support for the Republicans by instituting summary executions of suspected enemy fighters.
Operasi Westerling, yang dimulai bulan Desember 1946 sampai Februari 1947, berhasil meredam pemberontakan dan menghapus dukungan warga lokal terhadap kaum Republik dengan menjalankan eksekusi mati langsung terhadap orang-orang yang diduga musuh.