This is famously known as the 2nd great Subscriber War (aka PewDiePie VS T-Series). This started out as a YouTube conflict between PewDiePie and T-series for the title of being the most subscribed channel on YouTube. It later grew into something quite extraordinary, with many of PewDiePie fans buying billboard spaces and even celebrities supporting PewDiePie. However, on April 28, 2019, PewDiePie announced that he was officially ending the subscriber war, signing an armistice with T-Series digitally.
Even though the beef had ended, many of PewDiePie fans were sad when in late May, 2019 T-Series hit 100 million subscribers, while PewDiePie was at 96 million subscribers, therefore making it the first channel on the platform to earn that many subscribers. For many people, this was the unofficial end of the Subscriber war, since the goal was to see the first person to hit a 100 million subscribers. Many fans still claim PewDiePie is the most subscribed individually owned YouTube channel in the world and for many they still are waiting for channel to hit a 100 million subscriber.