Flag of Mongolia, based on file authored by user:Zscout370 (see https://en.wikipedia.org/wiki/File:Flag_of_Mongolia.svg) some elements of SVG file improved, including replacing the 24-pt lines on the arga-bilge (yin-yang symbol) with actual 24-px wide shapes, and reducing the file size (1022 kb to 135 kb). 
I do not take credit for the image the work was based off: "Current version is SVG implementation of the Mongolian flag as described by Mongolian National Standard MNS 6262:2011 (Mongolian State Flag. General requirements [1]

First-uploaded version created or scanned by SKopp" (see https://en.wikipedia.org/wiki/File:Flag_of_Mongolia.svg)
Own work
Dw0391