Burger wars

[1] The term first came into use during the late 1970s due to an attempt by Burger King to generate increased market and mind-share by attacking the size of bigger rival McDonald's hamburgers.

In 1987, Burger King laid off more than a hundred people from its corporate headquarters in Miami, Florida, while Dublin, Ohio-based Wendy's reported its first quarterly operating loss since its founding in 1969.

[7] In a 2007 advertising campaign, Jack in the Box aired a series of television ads in the United States that disparaged several rivals' Angus-beef burgers in which it was alleged that they equated Angus beef with an anus.

[8] Because of their similar preparation styles and menus, the expansion of Five Guys into the territories of its Los Angeles-based counterpart In-N-Out has been described as a newer version of the Burger Wars by several publications.

[11] Similarly, McDonald's Canada recently began offering free coffee for a week during Tim Hortons' "Roll Up the Rim to Win" campaign.