Why did Mahatma Gandhi launch the 'Non - Cooperation Movement'? How did this movement unite the country? Explain.

Mahatma Gandhi had launched the Non-Cooperation movement in 1921 with the aim of self-governance and fulfilling complete independence from the British colonial government.

In the beginning the British rule was established in India with the cooperation of Indians only, and Gandhiji wanted to withdraw it by using non-cooperation.