WITH Putin's war in Ukraine still raging on, The Sun takes another deep dive into the battlefield - exposing the Russian tyrant's vulnerable enclave and the West's Achilles heel.

Former intelligence officer and NATO planner Philip Ingram analyses the simmering WW3 flashpoint in the heart of Europe as part of the latest episode of Battle Plans Exposed.

Alongside Ingram, The Sun has been probing the intricacies of the bloody frontline in Ukraine in a new weekly series.

The latest episode takes a look at the Suwalki Gap - and why it has been dubbed Nato's Achilles heel.

Watch the new episode on The Sun's YouTube channel here...

Ingram investigates Russia's "vulnerable" enclave Kaliningrad which does not share a border with the rest of mad Vlad's motherland.

He also takes a look at the k

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