Looks like it
The US Constitution says only the US Congress can declare war. The last time it did so was against Romania in 1942. https://en.wikipedia.org/wiki/Declaration_of_war_by_the_United_States#Formal
Is Britain at War With Russia in Ukraine?
The US Constitution says only the US Congress can declare war. The last time it did so was against Romania in 1942. https://en.wikipedia.org/wiki/Declaration_of_war_by_the_United_States#Formal