BISMARCK — A Bismarck man who served in New Guinea during World War II has been reunited with a dog tag he lost there 75 years ago, thanks to a stranger digging a hole in the ground. “I was surprised because I had never seen it from the time I lost it and they found it,” said Ed Boger, who is now 97. Five years ago, Kenneth Muo volunteered to dig a hole to place a flagpole for a rural school in Lemieng village in Papua New Guinea. He found a dirty, rusted dog tag that belonged to Boger. Muo knew that only American soldiers wore dog tags, and he felt the need to return it.