Europe could be stepping up to the plate, but it's unclear if it will go the full mile in supporting Ukraine against Russia. 

A 'coalition of the willing' has formed - alongside a fractious interaction between the US and Ukrainian presidents.

Centre for European Policy Analysis senior fellow, Edward Lucas, says a partial truce could be the first step. 

But he warns protecting Ukraine further could prove tricky, especially if Russia attacks deployed European troops. 

"If a drone hit British or French or German barracks and killed a few people, what do we do? Send a cross-press release - or do we fire back and hit something inside Russia?"

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