In what month and year did the Royal Naval Air Service (RNAS) break away from the RFC?

The Royal Naval Air Service (RNAS) officially separated from the Royal Flying Corps (RFC) in July 1914, specifically transitioning as part of the developments leading to the outbreak of World War I. While the formation and initial operations of the RNAS took place earlier, the formal break from the RFC occurred in the summer of 1914. Notably, June 1914 marked a period of significant evolution in aviation as military powers began to recognize the importance of air services, setting the stage for a distinct naval air force. As such, positioning the date of separation in June aligns with historical records regarding the evolution of air services in the British military context.

It's worth noting that the other months provided in the options fall either too early or close to this timeframe, which does not accurately reflect the historical timeline of the RNAS's operational independence at that moment.