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The Line between Powder Mill Branch and the River Road, showing Battery Bailey, Battery Mansfield, Fort Mansfield, Battery Simmons, Fort Simmons, and Fort Bayard

Date
1818–1941
Place
the Civil War Defenses of Washington, D.C.
Archive
U.S. National Archives (via Wikimedia Commons)
Type
map
Original size
17,551 × 6,408 pixels

Public domain

Reason: a US government work.

This status rests on the map's publication history, as researched by Wikimedia Commons. Check it before commercial use.

Read from: Commons licence category: PD US Government; no CC BY, CC BY-SA, GFDL or deletion tag on the file page; Commons tags it as a US government work, but its record names no government maker.

Credit line

"The Line between Powder Mill Branch and the River Road, showing Battery Bailey, Battery Mansfield, Fort Mansfield, Battery Simmons, Fort Simmons, and Fort Bayard" (1818–1941). U.S. National Archives, via Wikimedia Commons. Public domain. https://commons.wikimedia.org/wiki/File:The_Line_between_Powder_Mill_Branch_and_the_River_Road,_showing_Battery_Bailey,_Battery_Mansfield,_Fort_Mansfield,_Battery_Simmons,_Fort_Simmons,_and_Fort_Bayard_-_NARA_-_122207800.jpg

What public domain means here

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