The 11th Army Corps was established as part of the ongoing military reforms within the Armed Forces of Ukraine. According to available information, Ukraine formed the 9th and 10th army corps and restructured its Reserve Corps to the 11th Army Corps in 2023. This shift intends to modernize the army and bring it closer to
NATO standards, as emphasized by President
Volodymyr Zelensky when he approved the plan for this reorganization. In July 2025, it was reported that Ukraine's had been reformed into the 11th Army Corps, including the
54th Mechanized Brigade and the
81st Airmobile Brigade operating near the city of
Siversk in the
Donetsk region. Throughout August and September 2025, it was reported that the 11th Army Corps was involved in combat in the
Siversk front near the
Serebrianka forest and the village of
Hryhorivka. In September 2025, the Ukrainian military announced that the 11th Army Corps had repelled Russian incursions near
Yampil in the Donetsk region. On 27 December 2025,
Ukrainska Pravda reported that the corps was removed from operational control of the Siversk front after failing to identify false reports provided by the command of the
54th and
10th brigades, which resulted in the loss of Siversk. == Structure ==