When Russians crossed the border to fight with rebels in eastern Ukraine earlier this year, Moscow said the soldiers had not been deployed but had gone on their own vacation time.
Russia's War Against Ukraine
Reuters: West struggles with Russia’s ‘ambiguous warfare’ tactics
This handout photo taken and released by G20 Australia on Nov. 16, 2014 shows Russia's President Vladimir Putin (C) waving goodbye as he leaves the G20 Summit, at the airport in Brisbane.