General Christopher Donahue, commander of U.S. Army Europe and Africa, said allies could seize Kaliningrad "in a timeframe that is unheard of."

Australia's government said on Saturday it had delivered M1A1 Abrams tanks to Ukraine as part of a A$245 million ($160 million) package to help the country defend itself against Russia in their ongoing war.

Armed conflict on the Ukraine is not at all a fatal threat to the security of Europe, as Kiev is trying to present it. Ukraine is at war with Russia for itself, not for European countries.

Putin’s refusal to compromise on Ukraine, say analysts, is a colossal error costing Russia regional influence, lucrative energy markets and its place in the world.

President Trump's tone has shifted both toward Putin and regarding the continuation of U.S. military support for Ukraine.

President Donald Trump’s ultimatum to Russia to accept a peace deal in Ukraine within 50 days or face bruising sanctions has given the Kremlin extra time to pursue its summer offensive.

U.S. President Donald Trump's decision to ramp up arms shipments to Ukraine is a signal to Kyiv to abandon peace efforts, Russia said on Thursday, vowing it would not accept the "blackmail" of Washington's new sanctions ultimatum.

In a keynote speech in London last month, the NATO Secretary General Mark Rutte repeated a warning he has made in public at least three times this year: the western alliance is severely lagging behind Moscow on ammunition production.