Complex sentence: But despite the official territorial achievements, the so-called "Great Thai Kingdom" was a paper tiger it was faltering as its economy failed to adapt to the conditions of war, natural disaster (floods) and Thai capital were being bombed by the Allies.
Split into simpler sentences: But despite the official territorial achievements, the so-called "Great Thai Kingdom" was a paper tiger. It was faltering as its economy failed to adapt to the conditions of war, natural disaster (floods) and the Thai capital being bombed by the Allies.