The Bath School disaster: Forty-five people, including many children, are killed by bombs planted by a disgruntled school-board member in Bath Township, Michigan.

The Bath School disaster, also known as the Bath School massacre, was a series of violent attacks perpetrated by Andrew Kehoe upon the Bath Consolidated School in Bath Township, Michigan, United States, on May 18, 1927. The attacks killed 38 children and 6 adults and injured at least 58 other people. Prior to the explosions at the school, Kehoe had murdered his wife, Nellie Price Kehoe, and set fires using timed devices at his farm. Arriving at the site of the school explosion, Kehoe died when he set off explosives concealed in his truck.

Bath Charter Township is a charter township of Clinton County in the state of Michigan in the U.S. As of the 2020 census, the township population was 13,292, an increase from 11,598 at the 2010 census. It is situated directly north of the city of East Lansing.

Michigan is a peninsular state in the Great Lakes region of the Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, Indiana and Illinois to the southwest, Ohio to the southeast, and the Canadian province of Ontario to the east, northeast and north. With a population of 10.14 million and an area of 96,716 sq mi (250,490 km²), Michigan is the 10th-largest state by population, the 11th-largest by area, and the largest by total area east of the Mississippi River. The state capital is Lansing, while its most populous city is Detroit. The Metro Detroit region in Southeast Michigan is among the nation's most populous and largest metropolitan economies. Other important metropolitan areas include Grand Rapids, Flint, Ann Arbor, Kalamazoo, the Tri-Cities, and Muskegon.

May 18 is the 138th day of the year in the Gregorian calendar; 227 days remain until the end of the year.