[thatguy96]

Well Cambodia has a complicated history from Neutralist Prince Sihanouk to General Lon Nol to the Khmer Rouge to the North Vietnamese invasion. What this means is that you have interesting things like T-28s shooting down VNAF aircraft (only one instance) and later MiG-17s with their guns replaced with .50 caliber M2s because of a shortage of replacement parts and ammunitions for the aircrafts original cannons.

There are a number of instances that are similar to what happened in the immediate aftermath of the unification of Vietnam where the new Vietnamese airforce has a combination of US and Russian/Chinese types and operated all US types on a sort of ad hoc basis until spares and weapons ran out, then dropping the type. Note that under unified Vietnamese control during the invasion of Cambodia, large numbers of F-5s, A-37s, and UH-1s were used because they were available and capable. Its a complex history.