The continuing mobilisation and concentration of the 4th Army was hampered by escalating Ustaše propaganda, and some units stopped mobilising, or began returning to their mobilisation centres from their concentration areas.
The continuing mobilisation and concentration of the 4th Army was hampered by escalating fifth column activities and propaganda fomented by the Croatian fascist organisation, the Ustaše. Some units stopped mobilising, or began returning to their mobilisation centres from their concentration areas.