Complex sentence: The 614th Space Intelligence Squadron is essential to the survival of not only the US military, but to the US economy which relies heavily on assets in space, the 614th Space Intelligence Squadron could be tasked with protecting those assets in the future.
Split into simpler sentences: The 614th Space Intelligence Squadron is essential to the survival of not only the US military, but to the US economy. Our economy relies heavily on assets in space, and the 614th Space Intelligence Squadron could later be tasked with protecting those assets in the future.