One of the most important and challenging tasks for the Space Force in its early years will be development of its doctrine and culture. Simple, clear, and strongly held doctrine orients a military and is a sine qua non for creating a strong and distinct military culture. Creation of the Space Force as an independent military organization should accelerate the development of space doctrine and help move it beyond what are, arguably, some of the most tenuous but often invoked analogies from maritime and air doctrine. Over time, as the space doctrine development process matures, it should provide an excellent foundation for the generation-long informal processes that will incubate a space-minded culture for the Space Force.