M198 usually refers to the
M198 howitzer
The M198 is a medium-sized, towed 155 mm artillery piece, developed for service with the United States Army and Marine Corps. It was commissioned to be a replacement for the World War II-era M114 155 mm howitzer. It was designed and prototyped a ...
, a medium-sized, towed artillery piece. M198 or M-198 may also refer to:
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M-198 (Michigan highway), a former state highway in Michigan
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Minardi M198, a 1998 Formula One racecar
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