The main weakness of the Revolt of 1857 was the lack of coordination and unison among the rebel Indian sepoys. This lack of coordination played a significant role in the failure of the revolt to achieve its objectives.

Lack of Coordination among Rebels:
• One of the major reasons for the lack of coordination was the absence of a centralized leadership. The revolt was a spontaneous eruption of discontent among the Indian sepoys and civilians, and it lacked a well-defined leadership structure. The rebels were not united under a common command, which resulted in fragmented efforts and a lack of strategic planning.
• The rebels were scattered across different regions and lacked effective communication channels. This made it difficult for them to coordinate their actions and share information. As a result, their efforts were often isolated and lacked the necessary strength to overcome the British forces.
• Moreover, the rebels lacked a common set of objectives. While some wanted to overthrow the British and restore the Mughal Empire, others aimed for regional autonomy or the restoration of their own kingdoms. This diversity of goals further hindered coordination and unity among the rebels.

Consequences of Lack of Coordination:
• The lack of coordination allowed the British to isolate and crush individual rebel uprisings. The British forces were able to swiftly respond to localized revolts and suppress them one by one, as the rebels failed to present a united front.
• The absence of a centralized leadership also meant that the rebels were unable to exploit their initial advantages. The revolt initially caught the British off guard, but their lack of coordination prevented them from capitalizing on this surprise factor and consolidating their gains.
• Additionally, the lack of coordination made it difficult for the rebels to sustain their efforts. They struggled to maintain supply lines, share resources, and coordinate attacks on British strongholds. This weakened their overall position and made it easier for the British to regain control.

In conclusion, the lack of coordination and unison among the rebel Indian sepoys was the main weakness of the Revolt of 1857. The absence of centralized leadership, fragmented efforts, and diverse objectives hindered the rebels' ability to effectively challenge the British. This weakness ultimately contributed to the failure of the revolt to achieve its goals.