https://docs.aws.amazon.com/powershell/v5/reference/items/New-EC2CapacityReservationFleet.html
EC2: New-EC2CapacityReservationFleet Cmdlet | AWS Tools for PowerShell
Calls the Amazon Elastic Compute Cloud (EC2) CreateCapacityReservationFleet API operation.
aws toolsnewcmdletpowershell