Thanks for the info, I did not know. I assumed because I served with Swede soldiers at a NATO command.
One of those alliances where we know which side the Swedes are on, and they observe and participate with us, while not joining us, but with the understanding that if Russia forced them out of their neutrality, that Sweden's military forces would have experience in coordinating with ours.
Swedish forces participated in Afghanistan, but they are not a NATO member.