Starbucks and Dunkin' Donuts

In 2007, Dunkin' ran ads that mocked the uppity coffee culture. Starbucks remained silent.

In 2008 Dunkin' declared its coffee superior to Starbucks. The campaign told coffee drinkers to avoid Starbucks with various catchphrases.

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The Pepsi Challenge of 1975 was the most widely known marketing clash between Pepsi and Coke.

Pepsi paraded around its triumph in the taste test for years, prompting Coca-Cola's horrific New Coke debacle in 1986. Since then, they've taken the fight in outer space, over social media, and fought over loyalty programs.

The 12 Most Intense Marketing Wars Ever

We've all seen the "Hi, I'm a Mac, and I'm a PC" commercials by Apple and the response by Microsoft, "I'm a PC."

Apple has been mocking Microsoft for years. But lately, Microsoft has fought back, for example, Microsoft's Zune ads, which bashed the iTunes model.

The 12 Most Intense Marketing Wars Ever

In an attempt to win the battle of Genesis vs. Super Nintendo, Sega produced a tagline "Genesis does what Nintendon't." Nintendo couldn't get rid of the stigma that Super Nintendo was for kids.

The console wars between Sega and Nintendo lasted from the 1980s to the early 2000s. Nintendo won that war but has since lost its top spot by Sony and Microsoft.

The 12 Most Intense Marketing Wars Ever

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