Dee ihe na-aga n'ihu maka paragraf a - Ndị agha Red Army meriri ọkara ndịda nke agwaetiti Sakhalin nke ọma. Obodo a bụ ebe Japan na Russia na-alụ ọgụ kemgbe otu narị afọ.
n'oge Agha Russo-Japanese nke 1905, na site na 1945, e kewara ya n'etiti mba abụọ ahụ (a na-akpọ ọkara ndịda Japan Karafuto Prefecture). Ndị Soviet weghaara agwaetiti ndị Kuril malite n'August 18, ụbọchị atọ mgbe ndị Japan chịsịrị.