(Let's try posting this in the right thread this time....)
I found the relevant quote I mentioned earlier from The Making of ROTJ, for the curious:
"I had this concept of the rebel briefing room as being a rather beaten up meeting place, sort of like Britain's last stand in 1940 before the Americans joined the war," Marquand says. "Norman [Reynolds, production designer] thought this was terrific, too. But when we showed it to George, he said 'No, no, no, you've got it completely wrong. That isn't what I intended at all. Your concept of how the rebels win is not the way they win. They win because they've got the best equipment. They've gotten themselves all together.'"