Ukraine is the largest Country in Europe. It has a population of around 45,000.
The Ukraine is split between pro-Russian sentiment in the east and those favoring closer ties to the EU in the west.
In Poland for talks with government leaders, Chancellor Angela Merkel has said that sanctions on Russia should be tied to fulfilling this year's Minsk agreement. Ukraine is just one of the bilateral meeting topics.
Ukraine's president Petro Poroshenko is reining in the super-rich oligarchs. Even though he's still one himself, Poroshenko says their influence must be curbed for Ukraine to have a future in Europe. So he is taking on erstwhile backers - like influential former governor Ihor Kolomoyskiy.
Poland has scheduled talks with the US over a Patriot missile deal, while its military plans to test Airbus helicopters. Poland's desire to upgrade its defenses has been spurred by the conflict in neighboring Ukraine.