What is the Su-25 aircraft?
The twin-engine jet aircraft was developed in the Soviet Union and is being used by both Ukrainian and Russian forces.
Russia
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Aircraft -
Russia Russian colonel reportedly killed in Ukraine helicopter crash
The colonel's helicopter appeared to go up in flames as it crashed in a field in the Donbas.
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Army British troops must prepare to fight in Europe once again, says Army chief
General Sir Patrick Sanders: I want to forge an Army capable of fighting with allies to defeat Russia.
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Ukraine UK, US and Germany to send rocket systems to Ukraine
The three NATO countries said they are committed to supporting Ukrainian armed forces with rocket systems and munitions.
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Nato 'Literally rocket science': NATO air defence drills focused by Russia
Exercise Ramstein Legacy put systems through live-fire tests and developed interoperability.
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Ukraine Ukraine: Russia targets ammo depot it says contained US howitzers
The depot targeted by Russia is located near the town of Zolochiv, close to Ukraine's border with NATO member Poland.
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Germany €100bn boost sees Germany join world's top three defence spenders
The approved additional spending means only the United States and China spend more than Germany on defence.
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Ukraine Ukrainian fighter 'superheroes' jump on viral social media trend
Ukraine's defence ministry declared that their fighters' superpower is 'being Ukrainians' in Avengers Assemble video tweet.
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Russia Schwarzenegger: We have blood on our hands for war in Ukraine
The actor and former governor of California said "we have to stop lying to ourselves" over Europe's purchasing of Russian fuel.
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Ukraine Russian cluster bomb attacks in Ukraine are war crimes, Amnesty International says
The human rights group has called for "comprehensive" justice processes, ensuring "all perpetrators are brought to justice".
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Weapons and Kit What are the missile defence systems that Ukraine wants?
Ukraine's President Zelensky has called for modern missile defence systems to help protect against Russian attacks.
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Ukraine Ukraine: Zelensky hails troops holding back Russian advance into country's east
After failing to capture the capital Kyiv, Moscow is focusing on the Donbas region.
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Ukraine Ex-British soldier shot and killed in Ukraine
Jordan Gatley was shot and killed in the city of Severodonetsk in eastern Ukraine, says his family.
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Ukraine PM demands ministers do 'everything' to secure release of captured Britons
The men sentenced to death for taking action towards violent seizure of power at a court in the self-proclaimed Donetsk People's Republic.
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Ukraine Defence Secretary meets Ukraine President in unannounced Kyiv visit
UK Defence Secretary Ben Wallace has agreed to work "even more closely" with Ukraine during meetings with President Zelensky.
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Ukraine What is the Geneva Convention and how does it apply to prisoners?
Prisoners of war can include members of the armed forces, volunteer militia and civilians accompanying the armed forces.