I want to know the answer to the following question:
Liquid-fueled rockets were developed in what year?
All the background I'm provided with is that "The American professor Robert H. Goddard had worked on developing solid-fuel rockets since 1914, and demonstrated a light battlefield rocket to the US Army Signal Corps only five days before the signing of the armistice that ended World War I. He also started developing liquid-fueled rockets in 1921; yet he had not been taken seriously by the public, and was not sponsored by the government as part of the post-WW II rocket development effort.". Is that enough to answer the question?
Answer: yes