lool well most countries in the world have more or less lost some lands, By your reasoning, India should be unified back with pakistan,sri lanka and bengladesh, the kurils should be returned to japan, mexico should retake california and new mexico, most subsaharan african countries should be reunited, Ireland should come back to the U.K, the soviet union should retake back all central and eastern european countries that were once part of the U.S.S.R, Russia should retake Alaska, paraguay should retake back half of its territory lost to Brazil and Argentina, Bolivia should also retake most of its territory lost to paraguay, germany should retake its territory lost to Poland, and poland to U.S.S.R, i can go on and on. But the point i'm trying to make is that humans are/will never be satified. we will always want more, even if China still had the russian far east, then it will still wish/want to have more land(say mongolia back or ryuku islands/okinawa etc.). Same with Britain wishing they still had their empire, or India wishing they were still united with \Pakistan/bengladesh/sri lanka etc. Countries territories will always change with time(witnessed the recent example of north and south soudan or Crimea). In say 50 or 100 years from now im sure the world territories will be very different from present, some will loose land other will gain. that is life/nature and we have to live with it.
