Watch: Inside Ukraine's new fortifications built to repel Russian invasion
Along the frontline Ukrainian engineers are installing miles of defensive fortifications, from trenches to concrete bunkers.
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Ukraine 'Significant milestone' as Ukraine hits two Russian warships with air strikes on Crimea
Ukraine's military said its defence forces successfully hit Russia's Azov and Yamal large landing ships.
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Ukraine Poland activates aircraft after Russian missile aimed at Ukraine enters its airspace
The Russian object flew into Polish space over Lublin Voyevodstvo and stayed there for 39 seconds.
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Russia Sitrep: Russia's electronic warfare tactics 'a wake-up call' for UK forces
This week's Sitrep podcast looked at important electronic warfare methods, with worries about Nato's capability.
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Ukraine Zelensky labels the Kremlin 'savages' after devastating wave of air strikes
More than 60 drones and 90 ballistic missiles were fired at major cities, including the country's largest hydroelectric plant.
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RAF The graduates: Ukrainian pilots complete RAF flight training vital to defending their nation
Ten Ukrainian pilots have graduated from training with the RAF and will ultimately be learning how to take the fight to Russia in the F-16.
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Russia Russia's wallet bleeds as Ukraine attacks multiple oil and gas sites that help fund war
Russia's war income is being targeted by Ukraine as it targets some of the country's largest refineries.
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Ukraine Ukraine in danger puts America at risk, US defence chief warns as cash and ammo run low
Lloyd J Austin III visited Germany to discuss support for Ukraine and warned that things were getting worse.
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Ukraine Defence Secretary forced to abandon Odesa trip due to security concerns
This trip to Ukraine was Grant Shapps' second as Defence Secretary and his third since the outbreak of the war.
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Russia Beriev A-50: Russia's airborne early warning aircraft that's fallen prey to Ukrainian missiles
The A-50 can detect threats and direct attacks, but as few as eight are thought to still be in service, and not all of those are flying.
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Russia Russia knocked out GPS to RAF aircraft carrying Defence Secretary, Downing St confirms
An aircraft carrying Mr Shapps as he was returning home from Poland was targeted by Russia through electrical interference.
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Weapons and Kit RPG-7: The iconic Soviet weapon used by soldiers, terrorists and militias around the world
This Cold War-era weapon is still in widespread use on the modern battlefield due to its robust design and innovative shaped charge warhead.
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Ukraine Ukraine's quick building of defensive positions slowing down Russia on frontline
The MOD says it is highly likely the expansion of defensive lines will reduce Russia's ability to advance or exploit tactical gains.
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Special forces Ship killers: Ukraine's mysterious Group 13 special forces unit terrorising Russian warships
The special forces unit known only as Group 13 has claimed responsibility for attacking Moscow's most modern warships.
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Russia Sitrep: German leak down to officers' 'arrogance' - and Russia could do the same to UK
A former Army intelligence officer says some Nato officers feel they don't need to stick to the rules, and that's being exploited by Russia.
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Opinion Get defence wrong and tax cuts won't matter – we need armoured mass now
Ex-Nato commander Hamish de Bretton-Gordon warns the Budget's lack of defence announcements is concerning and gives Russia the initiative.