When did the army start consolidating MASH units to CSH units?

The U.S. Army began consolidating Mobile Army Surgical Hospital (MASH) units into Combat Support Hospital (CSH) units in the late 1990s. This transition was part of an effort to modernize and improve the efficiency of battlefield medical care. The CSH units offered a more versatile and capable medical support structure compared to the traditional MASH units. The process was largely completed by the early 2000s.