Europe has woken up to a dark day after Vladimir Putin ordered Russian troops into two rebel-held regions of Eastern Ukraine.

The deployment came after an explosive speech by the Russian President last night in which he declared that Ukraine has no history of being a true nation, before recognising the Donetsk and Luhansk regions as independent states.

Moscow’s recognition of separatists’ claims to these Ukrainian territories has “torn up international law”, Boris Johnson said today.

Why has Putin chosen these regions, what will the ramifications be and is a full-scale invasion of Ukraine now inevitable? Here’s what you need to know.