US tanks and troops arriving in Poland

US tanks and armoured vehicles along with more than 3,000 US soldiers start arriving in Poland on Thursday.

They are part of President Barack Obama's response to reassure Nato allies concerned about Russia in context of "Atlantic Resolve" operation. It is the largest US military reinforcement of Europe in decades.

More than 80 main battle tanks and hundreds of armoured vehicles have already arrived in Germany and are now being moved into Eastern Europe by road and rail. The US Armoured Brigade will also carry out military exercises in the Baltics, all part of President Obama's response to Russia's intervention in Ukraine and to reassure nervous Nato allies.

The plan is to rotate forces every nine months.