Reasons for Gandhiji's decision to withdraw the Non-cooperation movement:

1. Chauri Chaura Incident:
The main reason for Gandhiji's decision to withdraw the Non-cooperation movement was the Chauri Chaura incident. In February 1922, a group of protestors clashed with the police in Chauri Chaura, Uttar Pradesh, leading to the death of several policemen. This violent turn in the movement went against Gandhiji's principle of non-violence, prompting him to call off the movement.

2. Concern for maintaining non-violent principles:
Gandhiji was deeply committed to the principle of non-violence as a means of achieving independence. The Chauri Chaura incident was a stark violation of this principle, and Gandhiji believed that continuing the movement in such circumstances would tarnish the image of the Indian independence struggle.

3. Lack of discipline among followers:
Gandhiji was also concerned about the lack of discipline among the followers of the Non-cooperation movement. The movement had seen instances of violence and unruly behavior, which went against Gandhiji's vision of a peaceful and disciplined struggle for independence.

4. Government crackdown:
The British government had started cracking down on the Non-cooperation movement, arresting many leaders and activists. Gandhiji realized that continuing the movement in the face of such repression would only lead to further violence and bloodshed.

5. Strategic retreat:
Gandhiji saw the withdrawal of the Non-cooperation movement as a strategic retreat rather than a surrender. He believed that by stepping back at this point, he could regroup, reorganize, and come up with a more effective strategy for achieving independence in the future.
In conclusion, Gandhiji's decision to withdraw the Non-cooperation movement was driven by his commitment to non-violence, concerns about discipline among followers, the violent turn of events at Chauri Chaura, government crackdown, and the strategic need to reassess the movement's approach.