After Napoleon, Russia was occupying Paris for a while. Ergo, Paris is old Russian territory.
Also, Novgorod was founded by vikings, therefore everything vikings ever held is old Russian territory.
In the end times of Byzantine (Eastern Rome), Muscovy bought the right to call itself a successor of Rome. Therefore, Spain and Morocco are old Russian territories. And Israel as well.
Socialism originally spread from the Russia. Therefore, all countries that have been socialist actually belong to the Russia. Yes: Angola, China, Laos, Venezuela. Alaska is old Russian territory, and is one unit together with USA. Therefore, Hawaii and Texas belong to the Russia.
Putin has said so around 2010.