shoulder to shoulder

shoulder to shoulder idiom
In close proximity or cooperation, as in The volunteers worked shoulder to shoulder in the effort to rescue the miners. This expression originated in the late 1500s in the military, at first signifying troops in close formation. Its figurative use dates from the late 1800s.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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