Holt's brief military career came to an end as a result of the Canberra air disaster on 13 August, which killed three senior government ministers. Menzies called an early general election for 21 September, which resulted in a hung parliament and a UAP–Country minority government. Holt was given leave from the army to campaign, and won re-election with a large majority. Menzies subsequently asked him to return to cabinet, to which he agreed. Holt was sworn in as Minister for Labour and National Service on 28 October, and formally resigned from the army the same day. He was placed in charge of the new Department of Labour and National Service, which took over most of the responsibilities of the previous Department of Industry. He also became a member of the bipartisan Advisory War Council, although he personally favoured the establishment of a national unity government with the Labor Party.