Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

Ukrainian military personnel receive armoured manoeuvre training on German-made Leopard 2 battle tanks at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)

A Ukrainian soldier works ontop of a German-made Leopard 2 battle tank during an armoured manoeuvre training at the Spanish army's training centre of San Gregorio in Zaragoza on March 13, 2023. - Spanish Prime Minister Pedro Sanchez said on February 23, 2023 during a visit to Kyiv that he hoped to send up to ten Leopard tanks to Ukraine in the coming months. (Photo by OSCAR DEL POZO / AFP)