Dumbledore and Grindelwald - The Greater Good - Crimes of Grindelwald Prequel

And at the height of his power, when Dumbledore knew he was the only one who could stop him, he duelled Grindelwald, and beat him, and he took the Elder Wand.
Decades before the legendary Duel, Gellert Grindelwald had come to Godric's Hollow to stay with his great aunt, Bathilda Bagshot. He became friends with the seventeen year old Albus Dumbledore, and they both became obsessed with the powerful objects known as the Deathly Hallows. This trio comprised the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility.[2]
The plans became more and more far-fetched. Albus's younger brother, Aberforth, intervened and pointed out the impossibilities of the scheme. Gellert quickly became enraged and the three began to Duel. Ariana Dumbledore was killed in the process.[3] This caused the end of Dumbledore and Grindelwald's friendship, and forced Grindelwald to flee, going on later to raise an Army in an attempt to continue his plan of wizarding domination