I know I am not really a beginner at this game but all the same I feel it appropriate to post this question here. I need to know how many Pacts you can have with other legions at one time. Does it matter for your base size? I am not sure where to find the information. I hear there is a cap of some kind.

You can have a maximum of 10 treaties, standard. However, by researching Xeno-Diplomacy in the Base research branch, you can unlock the Embassy module for your base. Each Embassy adds 2 to the max treaties you can have, up to a limit of 5 Embassy mods. So, if you sacrifice the necessary Special Space on your base to allow for 5 Embassies, you can have a total of 20 treaties.

Thanks Darth, I was able to find out shortly after I posted this but you did add additional information. Thanks for the reply.