There are hundreds of Inactive US Navy aircraft squadrons dating back to before World War I. Various sources sometimes refer to these as "disestablished" or "decommissioned" squadrons. However, squadrons are only "established", "disestablished", or "redesignated", while ships are "commissioned" or "decommissioned". Many squadrons have been re-designated or re-established, etc. making their "lineage" somewhat difficult to chart.