Complex sentence: He also led the North Australia Observation Unit (NAOU), the "Nackeroos" or "Curtin's Cowboys" formed in March 1942 and disbanded March 1945, they patrolled northern Australia for signs of enemy activity.
Split into simpler sentences: He also led the North Australia Observation Unit (NAOU), the "Nackeroos" or "Curtin's Cowboys". Formed in March 1942 and disbanded March 1945, they patrolled northern Australia for signs of enemy activity.