Why did China’s 2014 oil rig deployment near Vietnam lead to protests?

In 2014, China’s deployment of an oil rig into waters claimed by Vietnam triggered massive protests because the action was viewed as an aggressive assertion of Chinese territorial claims within Vietnam’s exclusive economic zone (EEZ).1

This incident occurred amidst long-standing territorial disputes in the South China Sea, where multiple nations contest sovereignty over features like the Paracel Islands. China has frequently sought to exercise its claims through nonmilitary means, such as deploying massive fishing fleets or, in this case, industrial infrastructure, to challenge the maritime boundaries of neighboring countries. These actions are part of a broader pattern of tension in the region, where claimants often clash over resources and sovereignty, leading to frequent confrontations at sea.12