The Sikh history page on the Battle of Chamkaur was deleted from the Wikipedia website after trolls spammed the page. The page appeared to not be done in an error but due to hundreds maybe thousands of people. Many on social media have called the act an attack on Sikh history.
A new page was immediately created on December 28, 2020 by Sikhs around the world and slowly getting the proper edits. However, it’ll be sometime before scholars can proofread the page and get it back to the original.
Several people reported on Twitter about the page being deleted:

"BATTLE OF CHAMKAUR SAHIB's"@Wikipedia Page unpublished in india??
— SUKHPREET SINGH / ਸੁਖਪ੍ਰੀਤ ਸਿੰਘ (@sukh_slatch) December 28, 2020
Idk why?🤷🏻♂️@singhwhotweets @Jatt_Sardaar@SinghLions @RaviSinghKA @hatindersinghr1 pic.twitter.com/w73AJBcOEH
Why is Wikipedia out here deleting pages on Sikh history. Battle of Chamkaur removed within the last 24 hours. All this being done on the anniversary of our historic battle#IamWithKhalshaAid pic.twitter.com/RbOeG9fFXr
— Amneet Brar (@_amneet_brar) December 28, 2020
Indian agencies have deleted battle of Chamkaur from Wikipedia 😡 https://t.co/3IVrLCWXv6
— Surrypur (@Surrypuria) December 28, 2020