On July 3, 1996, the Union Pacific Railroad paid $5.4 billion to acquire its longtime competitor and partner, the Southern Pacific Railroad. Integration missteps, combined with booming demand for railroad services, led to a service meltdown that cost UP billions in lost profits, damaged the company's reputation as an industry leader, and significantly impacted the U.S. economy. The case, which takes the perspective of Dick Davidson, chairman and CEO of Union Pacific Corp., describes the key events that led to the service meltdown. It provides an excellent platform to discuss post-acquisition strategy and how fast companies should move to integrate acquisitions.