Which 1951 waterfront industrial dispute saw the government invoke emergency powers, deregister the Waterside Workers' Union, and deploy the army to work the wharves, in what became the most bitter industrial conflict in the country's history?

• A The 1951 waterfront lockout ✓
• B The 1913 Great Strike
• C The 1979 general strike
• D The 1932 unemployment riots

The 1951 waterfront dispute lasted 151 days, with Prime Minister Sidney Holland's National government using the Public Safety Conservation Act to ban publications, seize union funds, and bring in 'scab' labourers under military protection.