Russia has occupied about 20% of Ukrainian territory since illegally annexing Crimea in 2014, but its gains after the Feb. 24, 2022, invasion have been slow. NATO Secretary-General Mark Rutte this month likened Moscow's advance to “the speed of a garden snail.

Ukrainian President Volodymyr Zelensky said his country has withstood the onslaught by Russia’s bigger and better equipped army.

A senior European intelligence chief says Russia cannot launch an attack on NATO this year or next but is planning to increase its forces significantly along the alliance’s eastern flank, depending on the outcome of the war in Ukraine.

NATO needs to use this time to prepare for a Russian resurgence in the Arctic, a top Norwegian military official told Business Insider.

Four years of war in Ukraine has brought seismic evolution to the world - to the nature of warfare, the balance of global powers, and to European security.

Estonia intelligence assessment reveals Russia rebuilding military for long-term conflict despite massive Ukraine losses, shifting to mass production.

Trade, energy flows and dual-use technology have become the economic lifeline sustaining Moscow’s war despite Western sanctions.

Australia has slapped fresh sanctions on nearly 200 Russian individuals and entities as the world marks four years since the full-scale invasion of Ukraine.

Ahead of it, the BBC has spoken to Serhii Kyslytsia, a member of Ukrainian President Zelensky's delegation, who has taken part in the recent military-to-military discussions. According to Kyslytsia, these dealings are business-like and generally free of the sort of political and historical grandstanding seen elsewhere by Moscow.