infartillery
n.— «To combat the mortar-firing insurgents, Vuono’s soldiers have become what some soldiers call “infartillery”—artillery experts who can also use infantry skills to root out the enemy in urban warfare.» —“Goodbye, Mortaritaville ; 3rd HBCT unit is making the U.S. base’s nickname inapt” by Tom Roeder Gazette Sept. 4, 2006. (source: Double-Tongued Dictionary)