His alliance with the Turks may be due to their mutual hostility towards Sigismund .
First Turkish troops brought terror to Bosnia in May 1414 ; in August they also brought the deposed monarch , Tvrtko , and set him up as anti-king .
Tvrtko 's alliance with the Turks may be due to their mutual hostility towards Sigismund .
First Turkish troops brought terror to Bosnia in May 1414 ; in August they also brought the deposed monarch , Tvrtko , and set him up as anti-king .