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This is how the term "Legion of Boom" came about.
What is Twitter.
The phrase refers to the Seahawks' fast, physical, and hard-hitting defensive unit headed by free safety Earl Thomas, strong safety Kam Chancellor, and cornerbacks Richard Sherman and Byron Maxwell. In early 2012, it was Chancellor who noted the Seahawks' secondary loves to "bring the boom" and with the 12th Man clamoring for a nickname to apply to their beloved back four, "Legion of Boom" took off via Twitter.