The integration of Indian Princely States into the Indian Union was a complex process that faced several administrative and socio-cultural challenges. Some of the main issues that arose during this period include:

Administrative Issues:

1. Integration of Princely Armies: The integration of princely armies into the Indian Army was a significant challenge. Many princes were reluctant to give up their armies, leading to conflicts and tensions.
2. Reorganization of Administration: The integration required the reorganization of administration in the princely states, which involved merging different systems of governance, laws, and institutions.
3. Transfer of Power: The transfer of power from the princes to the central government was often gradual and uneven, leading to confusion and resistance.
4. Financial Management: The integration process required the management of the finances of the princely states, which was a complex task due to different accounting systems and financial structures.
5. Jurisdictional Conflicts: There were jurisdictional conflicts between the central government and the princely states, particularly regarding taxation, law and order, and external affairs.

Socio-Cultural Problems:

1. Cultural Identity: The integration process led to a loss of cultural identity for many Indians who had lived under princely rule for generations.
2. Social Change: The integration process brought about significant social change, as Indians were exposed to new ideas, customs, and ways of life.
3. Economic Disruption: The integration process disrupted traditional economic structures and livelihoods, leading to economic hardship for many people.
4. Language and Education: The integration process required the introduction of new languages and educational systems, which was a challenge for many people who were used to different languages and educational systems.
5. Resettlement: The integration process led to the resettlement of people from one region to another, which caused social and cultural disruption.