The Unionist Party mainly represented the interests of the landed gentry and landlords of Punjab, which included Muslims, Hindus and Sikhs.
The Unionists dominated the political scene in Punjab from World War I to the independence of India and the creation Pakistan after the partition of the province in 1947.
The creed of the Unionist Party emphasized: "Dominion Status and a United Democratic federal constitution for India as a whole".
In the 1937 Indian provincial elections, the Unionist Party soundly defeated the Muslim League in Punjab.
[7] The Muslim League's Direct Action Day campaign brought the downfall of Sir Khizar's ministry, which depended on Congress and Akali support; inter-community relations were effectively destroyed as communal violence against Hindus and Muslims across India claimed the lives of tens of thousands of people.
In Sindh, a Sind United Party modeled on the lines of the Punjab Unionists and represented similar interests.