The Niagara Military Museum is a modest but useful stop for travellers interested in the region's martial history. Its collection ranges across local regiments, the War of 1812, later Canadian service, uniforms, medals, and personal stories from the Niagara area.
It is not as polished as the major Niagara Parks attractions, and that is part of its character. Check opening hours before going, since smaller museums can be volunteer-dependent, and combine it with other historic sites if you want to balance the falls with the borderland history around them.