From 1991, the original pure attack Étendard IVMs were withdrawn from French service; though the reconnaissance version of the Étendard IV, the IVP, remained in service until July 2000. In response, the Super Étendards underwent a series of upgrades throughout the 1990s to add new capabilities and update existing systems for use in the modern battlefield. Designated "Super Étendard Modernisé" (SEM), the first combat missions for the type came during NATO's "Allied Force" operations over Serbia in 1999; it was reported that over 400 combat missions were flown with 73% of the assigned objectives destroyed, the best performance of all the air forces involved in the missions over Serbia.