The Leopard 1A5 battle tank entered service in the 1980s and was last used by the German army in 2000.
Ukraine may also get old Leopard 1 tanks from German stocks
An Obsolete German Tank Seeks a Second Life on Ukraine's Front Lines - The New York Times
Leopard 1: Tank Designed And Produced By Porsche
Ukraine has more weapons for its war with Russia, but not German tanks - Vox
Weapons Transfer to Ukraine: Germany Outlines Plans for 2024 - Militarnyi
The Elefant - Both Excellent and Terrible
T-14 Armata - Wikipedia
Germany Unveils New $3 Billion Weapons Package For Ukraine War Effort
Luxury Porsche converted into a high-tech military vehicle for a commander in Ukraine's army
Leopard 2 - Wikipedia
Weapons Transfer to Ukraine: Germany Outlines Plans for 2024 - Militarnyi
Austin meets new German defense minister over Ukraine tank support