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- The machinery, honestly: Foreign-Trade Zone No. 125 Exports
- The machinery: a war recorded under another township's name Wars & Military Service
- Major Donations Section
- The maker test, as the headline: no farm tractor was ever built in Walkerton Tractors
- The makers, house by house — and the creamery conflict, reconciled as a finding Food & Drink
- Malls & Shopping Section
- The manager: Myrna Daube, 1969–1992 License Branch
- The managers roll: seven football coaches since 2004 documented as a count; the complete rolls owed Sports
- The market line: no standing farmers' market in Walkerton — the line dug once Farms & Agriculture
- The market report: what Walkerton ate, priced every Friday noon Food & Drink
- Marking, counted both ways: the state's instrument named, the town's marker read whole Historic Preservation
- The marsh: the ground's defining fact The Land
- The matinee record: a house from 1916, its children's programming unnamed in the record Kids & Family Entertainment
- Mechanisation — the succession the township's record actually gives Farms & Agriculture
- Medical advancements and the searched negative; the one research seat the register carries Health & Care
- Memorial Day as an institution: the position, and its settler Veterans
- The memorial the town did raise: the Mothers of World War II stone, 1947 Wars & Military Service
- Memories Pizza: the Roosevelt Road parlor, c. 2006–2018 Food & Drink
- Mental Health Institutions Section
- Mental health: the facility test, stated whole, and the designated holders named Health & Care
- The merger of 1962, and the end that is not yet dated Newspapers & Media
- The method, as practiced — and the four doors Sources
- The Methodist course, 1859–2026: the West York Mission Church becomes Walkerton Community Church Churches & Religion
- The Mexican War: thirteen county men, none of them this ground's Wars & Military Service
- Migration and the industrial ceiling: the wave that passed this town by Black History
- Military Section
- Military Records: Open Questions Wars & Military Service
- The Militia Years: The County's Standing Companies, and Lincoln Township's Share Military
- Mills, lumber and the wood trades — Rogers' flour mill, Schwartz & Tischer, the hoop factories Businesses
- Miniature golf, both waves: neither the 1930 craze nor the carpet course is documented here Kids & Family Entertainment
- The Mishawaka-Penn-Harris Public Library, and the Allen County Public Library Sources
- The modern course — doors, composites, and the corridor, 1940–2026 Businesses
- The modern database era, worked as a database: NUFORC's record for Walkerton, Indiana UFO Sightings
- Modern founders and chiefs, dated: Shobert's firm, and the bank's new head Founders & CEOs
- The modern layer, and the movers: the present firms at their size, and the roster of who built the base Technology
- The modern ledger: the series named, the town's share uncounted by construction Exports
- The modern nations' own accounts: this valley, in the Pokagon Band's published voice Native Nations
- The modern record, the standing negatives, and what the file does not carry Crime & Public Safety
- The money fights, by class: the defalcation is a crime-file fact; the classic classes test blank Government
- More Businesses Section
- The motel era, at directory strength, 1950–1990 Hotels & Motels
- The mother-church test: the question put to a read-whole record Black History
- The multi-victim and family class, tested as a class Crime & Public Safety
- The Multiplex Succession, as a Boundary Record Arts
- The murder case: Pittman v. State , 1986–1988 Crime & Public Safety
- Museums Section
- Music Section
- The Music Rooms, as Rooms Bars & Nightclubs
- MYSTERY, worked: which Walker named the town (GAP-W-NAME-1) Famous Stories & the Record