I read somewhere that if rejs have too many units at the reb base the imps draw more probecards or something ? Was it a dream? Also, you can have unlimited number of units at any system right?

There is no limit to the number of units in a system, (aside from the limit of the number of miniatures in the game). There is, however, an Imp card that allows you to draw more probe cards depending on teh number of units on the Reb base, (at work, so, I don't have the actual card in front of me for ref).

Gather Intel is a starting Imp mission card. Attempt in any Rebel system. Draw a probe card for every 4 units at the Rebel base. It's got the elephant face spy.

Gather Intel is a starting Imp mission card. Attempt in any Rebel system. Draw a probe card for every 4 units at the Rebel base. It's got the elephant face spy.

Thank you.

Thanks

As a result, 7 is typically an ideal number of units to keep at the Rebel base. With 7 units, your presence will be far from nothing, but the Empire will still be drawing only 1 Probe card for playing Gather Intel. Remember, Ion Cannons and Shield Generators count toward this limit!