The legal basis for the introduction of martial law in Ukraine (Ukrainian: Воєнний стан в Україні, romanized: Voiennyi stan v Ukraini) is the Constitution of Ukraine, the Law of Ukraine "On the legal status of martial law" (No. 389-VIII from May 12, 2015[1]) and presidential decrees about the introduction of martial law. Modern-day martial law has been introduced two times in Ukraine; in 2018 for 30 days and an ongoing period since 24 February 2022 in response to the Russian invasion of Ukraine that started on 24 February 2022.