The Leopard 1A5 battle tank entered service in the 1980s and was last used by the German army in 2000.
Germany's ring exchange with Ukraine: An assessment – DW – 11/09/2022
Germany To Send Anti-Tank Weapons, Missiles To Ukraine In Policy Reversal
Germany allows 105mm Leopard 1A5 + APFSDS ammo go to Ukraine
Russia-Ukraine war: Germany says battle tanks won't be ready until 2024 - The Week
10 tanks that changed the history of armored warfare
Russia-Ukraine War: Poland Says It Will Push to Send Tanks to Ukraine - The New York Times
Cold War West German Prototypes Archives - Tank Encyclopedia
To extend offensive, Ukraine demands tanks but says Germany won't help - The Washington Post
Armata – the story is over » Wavell Room
Olaf Scholz's Ukrainian tank battle – POLITICO
Ukraine war orders boost US defence contractors' revenues