If I control a battlefield on my turn but then move all my units off of it, do I retain control until end of turn and can I still play units there?

Ruling: No, you lose control of the battlefield immediately after moving your units off of it during the cleanup step, and you cannot play units there without control.

Sequence:

• Step 1: You move your units off the battlefield
• Step 2: During cleanup (step 4), you lose control of the battlefield
• Step 3: You can no longer play units to that battlefield without control