T'Challa organizes an outreach center for Wakanda in Oakland after an intense battle with Killmonger in Black Panther. If we're going to get technical, we might as well consider the first postcredits scene in Black Panther, where T'Challa addresses the United Nations. He tells the UN that Wakanda is ready to share its technological advancements with the world. This is a pretty important set-up to Avengers: Infinity War, since wielding Wakanda's cutting-edge technology can put the Avengers at an advantage when Thanos threatens to, you know, destroy the universe.