Wikipedia:Selected anniversaries/March 18
This is a list of selected March 18 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article or picture of the day.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
March 18: Flag Day in Aruba (1976)
- 1229 – Sixth Crusade: Holy Roman Emperor Frederick II crowned himself King of Jerusalem, although his wife Queen Yolande of Jerusalem had died, leaving their infant son Conrad as the rightful heir.
- 1871 – French President Adolphe Thiers ordered the evacuation of Paris after an uprising broke out as the result of France's defeat in the Franco–Prussian War, leading to the establishment of the Paris Commune government.
- 1892 – Canadian Governor General Frederick Stanley of Preston pledged to donate what would become the Stanley Cup (1893 version pictured), today the oldest professional sports trophy in North America, as an award for Canada's top-ranking amateur ice hockey club.
- 1915 – World War I: In one of the largest naval battles in the Gallipoli Campaign, a joint British and French operation to capture Constantinople, the defences of the Ottoman Empire sank three Allied battleships and severely damaged three others.
- 1965 – Cosmonaut Alexey Leonov donned a space suit and ventured outside the Voskhod 2 spacecraft, becoming the first person to walk in space.