I want to know the answer to the following question:
When did the western half of the state become Hesse?
All the background I'm provided with is that "After the extinction of the reigning Ludowingian line of counts and landgraves in 1247 and the War of the Thuringian Succession (1247–1264), the western half became independent under the name of "Hesse", never to become a part of Thuringia again.". Is that enough to answer the question?
Answer: yes