The Nationalist Congress Party (NCP) is a political party in India that was formed on June 10, 1999. The formation of the NCP can be traced back to a significant event in Indian politics, the split within the Indian National Congress (INC). To provide a plagiarism-free answer, I will provide a brief overview of the circumstances leading to the formation of the NCP.

In the late 1990s, the Indian National Congress, which had been one of the dominant political parties in India since independence, experienced internal divisions and disagreements. This led to a split within the party, resulting in the formation of a new political entity known as the Nationalist Congress Party.

The primary figures involved in the formation of the NCP were Sharad Pawar, P.A. Sangma, and Tariq Anwar. These senior leaders of the Indian National Congress disagreed with the party's leadership and their approach to various issues, including the choice of the party's presidential candidate in 1999. They believed that the Congress leadership, at the time headed by Sonia Gandhi, did not adequately represent their viewpoints and concerns.

As a result, these dissenting leaders decided to part ways with the Indian National Congress and establish a new political party that would better align with their vision and objectives. On June 10, 1999, they formally announced the formation of the Nationalist Congress Party (NCP).

The NCP positioned itself as a centrist party with a focus on secularism, social justice, and regional aspirations. It aimed to represent the interests of diverse sections of society, particularly farmers, laborers, and marginalized communities. Sharad Pawar emerged as the key leader of the NCP and played a crucial role in shaping its ideology and organizational structure.

Since its inception, the NCP has participated in various state and national elections, forming alliances with other political parties to maximize its electoral prospects. It has had a significant presence in states like Maharashtra and has also been a part of coalition governments at the central level.

It is important to note that the formation of the NCP was a result of complex political dynamics and ideological differences within the Indian National Congress. The party sought to create an alternative political platform that could address the concerns of its founding members and offer a distinct political identity. Over the years, the NCP has evolved as an influential political force in Indian politics, contributing to the country's multi-party system and shaping the socio-political landscape.