It was led by the state deputy leader of the Country Party, Alec Thomson.
The members of the Executive faction wanted better representation of the Primary Producers' Association by the party, while the remainder (known as the Majority Country Party) chose to primarily support the Nationalist coalition led by then Premier James Mitchell.
In 1923, three members of the 16-member Country Party split to form the ECP.
The Executive Country Party contested the 1924 Western Australian elections, winning six seats in total.
The Majority Country Party meanwhile was reduced from 13 to seven seats, and the Nationalist Coalition was defeated by the Labor opposition, led by Philip Collier.