National Sovereignty is the condition of a nation that has self-rule, a stable government and the right to exist without interference from other nations.
Whereas
Demilitarization is the process of reducing and even eliminating the armed forces of a nation.
Mumbai Indians won the IPL (Indian Premier League) 2019 title. They won this title for the fourth time in the 12 years. They have won this against CSK in the final at hyderabad.