SharePoint Online: Delete Site Column using Powershell

Requirement: Delete Site Column in SharePoint online using PowerShell

How to delete a site column in SharePoint online?
To remove a SharePoint online site column, follow these steps:

• Go to Site Settings by clicking Site settings gear and then "Site settings" from the menu.
• Click on "Site Columns" link from Web Designer Galleries group >> Select the site column to delete.
• Scroll down and click on "Delete" button and confirm the prompt to delete.
  

This removes a site column in SharePoint online.

SharePoint online PowerShell to delete site column:

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"

#Set Variables for Site URL and Site column Title
$SiteURL= "https://crescent.sharepoint.com/sites/sales"
$ColumnName="Sales Region" #Case sensitive

#Setup Credentials to connect
$Cred = Get-Credential
$Cred = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.UserName,$Cred.Password)

Try {
    #Setup the context
    $Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
    $Ctx.Credentials = $Cred

    #Check if the site column exists
    $Fields = $Ctx.web.Fields
    $Ctx.Load($Fields)
    $Ctx.ExecuteQuery()
    $FieldNames = $Fields | select -ExpandProperty Title

    #delete site column in sharepoint online
    If($FieldNames.Contains($ColumnName))
    {
        #Delete the site column
        $SiteColumn = $Fields.GetByTitle($ColumnName)
        $Sitecolumn.DeleteObject()
        $Ctx.ExecuteQuery()

        Write-host -f Green "Site Column Deleted Successfully!"
    }
    else
    {
        Write-host -f Yellow "Site Column Doesn't Exists!"
    }
}
Catch {
    write-host -f Red "Error deleting Site Column!" $_.Exception.Message
}