Sweden has formally joined NATO as the 32nd member of the transatlantic military alliance, ending decades of post-World War II neutrality and centuries of broader non-alignment.
They are not forced legally but practically indirectly. It is as voluntary as someone agreeing to landlords terms or those of your employer. Legally speaking, yes no one is forcing you, practically speaking you don’t really have a choice and such a system was created on purpose so you can’t have a choice.
Once you start depending on US for their support in your defense, you need to scratch their back in doing an invasion or two so they keep supplying your weapons.
They are not forced legally but practically indirectly. It is as voluntary as someone agreeing to landlords terms or those of your employer. Legally speaking, yes no one is forcing you, practically speaking you don’t really have a choice and such a system was created on purpose so you can’t have a choice. Once you start depending on US for their support in your defense, you need to scratch their back in doing an invasion or two so they keep supplying your weapons.