Hazrat Mirza Ghulam Ahmad, the Promised Messiah, received a promise from Allah that Hazrat’s teaching will be made known to people in all corners of the world. Hazrat sahib did not just sit back and wait for it to happen. He made strenuous efforts to make the prophecy come true. He did so by writing letters, books and hand bills, getting them translated into English and spreading them as far as possible. Some years ago, a wrapper from Qadian was found in the US. We also know of his letters being printed in the US newspapers.
The video below discusses these themes in more detail.