refers to the topic of 10.
The is more like , topic.
() here means "Forget about..." "Never mind..."
can mean "not important" "doesn't matter" () or "unnecessary" "enough" ().
eg **** "Let's not discuss it anymore."
**** "Forget about washing-up."
> Kinoc: Tell me, Aaron. What have you been doing these ten years?
>
> Aaron: The(=Our) operation begins (now / soon). Forget about it (=the topic of what I've been doing)
> (Implying it's not the right time to talk about it. And using makes it sound like he doesn't really want to talk about it)
>
> Kinoc: It's a failure plan anyway. We'll let them dream just a little longer.