 Complete the following phrase:  Mihailović undertook a military and political structuring of the movement. In August 1941, he formed the Chetnik National Committee as an advisory body. It included former politicians and members of organizations such as the Serbian Cultural Club, with a Greater Serbian ideological orientation. Outside Serbia, various independent groups were formed that shared the same ideology as the Chetniks. These groups took part in armed uprisings against the Ustashe-led Independent State of Croatia NDH, an axis puppet state established in occupied Yugoslavia, in the summer of 1941. The uprisings were a reaction to the 