Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue 
 
#Parameters
$WebURL = "https://siigadmin.sgc.gov.co"
$ListName="EjecucionSincronizacionMapasArcgis"
 
#Get web List and List Items
$Web = Get-SPWeb $WebURL
$List = $Web.Lists[$ListName]
 
$Query = New-Object Microsoft.SharePoint.SPQuery
$Query.ViewAttributes = "Scope='Recursive'"
$Query.RowLimit = 2000
 
#Delete List items
Do
{
    $ListItems = $List.GetItems($Query)
    $Query.ListItemCollectionPosition = $ListItems.ListItemCollectionPosition
 
    Foreach($Item in $ListItems)
    {
        Write-Host "Deleting Item - $($Item.Id)"
        $List.GetItemById($Item.Id).delete()
    }
}
While ($Query.ListItemCollectionPosition -ne $null)