This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Creweleafletballon. Weltkrieg britische Flugbltter Own work all rights released public domain commonsUser kilima AnonymousEU Balloon aircraft Military ballooning
Page 2023 Free-images.com. All images are Public Domain