Speculation has swirled over whether the Trump-Putin summit will result in the map of Ukraine being forcibly – and fundamentally – altered.
Russia has laid claim to vast parts of Ukraine since 2014, when President Vladimir Putin made his first move.
At the time, in the space of a short few months, Moscow carried out the relatively bloodless occupation and annexation of the Crimean peninsula.
But that was followed by a Russian-backed separatist movement in the eastern Donbas region – specifically the two regions, or "oblasts", known as Donetsk and Luhansk.
A war simmered there for eight years.
