Organizations and charities such as the Royal British Legion use that social media to get their message across. They promote schools' familiarization and learning packages and within that they'll use certain aspects of social media to attract youngsters. It's another way of moving messages around.
I think those engaged in supporting veterans and promoting veterans affairs are fully aware of modern social media. Whether that social media has had a specific impact other than perhaps the way they spread their messages, I'm not so sure. Nothing comes to mind as an example.