Okay, you’re sort if correct. He alluded to it. He mentioned the Russian Empire attacking various neighbors and taking over their territory using excuses of ethnicity and then referred to it as returning and reinforcing, not conquering. He then said it fell to their lot to return and reinforce, as well. Here’s a link that discusses it. Given the date and the discussion, I’m sure you can find other sources for it. That was just the first that appeared on my search.