Jawaharlal Nehru was succeeded by a mild-mannered and soft-spoken Lal Bahadur Shastri on 9 June, 1964.
He was a follower of Nehruvian socialism. Despite the strong influence and desire of becoming the Prime Minister, of some party stalwarts Shastri emerged as the consensus candidate.
Shastri tackled many elementary problems like food shortage, unemployment and poverty. To overcome the acute food shortage, Shastri asked the experts to devise a long-term strategy.
This was the beginning of famous "Green Revolution". Apart from the Green Revolution, he was also instrumental in promoting the White Revolution.
The National Dairy Development Board was formed in 1965 during Shastri as Prime Minister.
After the Chinese aggression, the major cross-border-problems Shastri faced was caused by Pakistan.
It sent her forces across the eastern border into the Rann of Kuch in Gujarat. Shastri showing his mettle, made it very clear that India would not sit and watch. While granting liberty to the to retaliate He said, "Force will be met with force".
The Indo-Pak war ended on 23 September 1965 after the United Nations passed a resolution demanding a ceasefire.
The Russian Prime Minister, Kosygin, offered to mediate and on 10 January 1966, Lal Bahadur Shastri and his Pakistan counterpart Ayub Khan signed the Tashkent Declaration.