Thai–Cambodian border conflict
If you're asking about the short conflict between Cambodia and Thailand, it's often referred to as the:
Cambodia–Thailand Border Dispute
or
Preah Vihear Temple Conflict
This conflict mainly occurred in the late 2000s and early 2010s, especially around 2008–2011, and it involved military clashes near the Preah Vihear Temple, a UNESCO World Heritage Site located on the disputed border.
Summary:
Main Cause: Dispute over ownership of land near Preah Vihear Temple.
Historical Background: The International Court of Justice (ICJ) awarded the temple to Cambodia in 1962, but Thailand disputed land around it.
Clashes: Small-scale armed confrontations occurred between 2008 and 2011.
Resolution: The ICJ ruled again in 2013, reaffirming Cambodian sovereignty over the temple and surrounding area.