Which country launched the ‘Ukraine Security Assistance Initiative’?

Which country launched the ‘Ukraine Security Assistance Initiative’?

کس ملک نے 'یوکرین سیکیورٹی اسسٹنٹ انیشیٹو' کا آغاز کیا؟
Explanation

In 2023, Ukraine Security Assistance Initiative was launched by the US to increase Ukraine’s capacity to defend itself from Russia’s aggression.