Category:Flags introduced in 1840 is within the scope of the Heraldry and vexillology WikiProject, a collaborative effort to improve Wikipedia's coverage of heraldry and vexillology. If you would like to participate, you can visit the project page, where you can join the project and see a list of open tasks.Heraldry and vexillologyWikipedia:WikiProject Heraldry and vexillologyTemplate:WikiProject Heraldry and vexillologyheraldry and vexillology articles
This category is within the scope of WikiProject Years, a collaborative effort to improve the coverage of Years on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.YearsWikipedia:WikiProject YearsTemplate:WikiProject YearsYears articles
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