When Western was bought by Delta in 1987, their fleet consisted of 727-200s, 737s (200s and 300s), and DC-10s. Delta kept all but the DC-10s, since they already operated L1011s.
Republic's fleet when merged into Northwest consisted of 727-200s, DC-9s, MD-80s, and 757s. Shortly after the merger, RC's 757s were sold to America West because they had different engines than their NW counterparts. NW also parked the MD-80s in the desert a year or two ago. Other than that, Northwest operates most of the old RC fleet today.
At Eastern, we earn our wings every day!