There are three flags for this command:

• -f/--force: Destroys the Vagrant machine without asking you for confirmation.
• --parallel/--no-parallel: Enables or disables parallelism only if the provider supports it. We are using VirtualBox as the provider in this book, and at the time of writing it does not support parallel execution. Running this flag will enable the force flag too.
• -h/--help: Prints the help screen for this command.

An example is the vagrant destroy --force command.