In response to suggestions by a lunatic in the US Oval Office, Green Party Canada’s leader Elizabeth May suggested Canada should invite western states Washington, Oregon and California join B.C and split from Canada to form the ‘Cascadia’ eco-state.
(Note this article is from Jan 8, 2025 and Elizabeth May has since become co-leader of the party alongside Jonathan Pedneault).
I suspect you would find a huge chunk if CA’s military gear requires stuff from other states.
It wouldnt matter as IRL the tech industry would jump ship and most who would be involved in this understand that fact.