What is Indian expansionism?

Inheriting the expansion achievements of British colonialism and attempting to illegally expand territory under the pretext of preventing neighboring countries from attacking and developing military power is the manifestation of extreme nationalism in India and is caused by imperialist expansion. The classic sentence is "The Indian Ocean is the ocean of India". Under the impetus of Indian expansionists, they invaded China's southern Tibet and Tawang areas, claimed the territory of China's Aceh area, launched the India-Pakistan war, divided East and West Pakistan, and controlled small countries such as Bhutan and Nepal.