Hello,

you could have a look at the book Programming Game AI by Example.
As its name implies, the book deals with the development of game AI. This includes, without limitation, implementation of different behavior models (eg. state-driven behavior and goal-driven behavior), autonomous agents and some basic math (vector math, trigonometry etc). From my point of view this book is highly recommended.

The book also features a simple method for obstacle avoidance, which you will most probably need in your space RTS. But keep in mind that your obstacle avoidance solution eventually needs to be much better and more complex.

There are other books out there that specialize in programming RTS games. However, to my knowledge, these books are not advisable.

And by the way: there is a space RTS developed in A6, named 2662, featured in AUM no. 67.