tank pictures have been adapted from tanks-encyclopedia.com

plane pictures adapted from clavework-graphics.co.uk

Ship pictures:
Scharnhorst-class: By Alexpl - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=2044610
Graf Zeppelin: DG_Alpha, via shipbucket.com
M-class: Maomatic, via shipbucket.com
Q-class: Maomatic, via shipbucket.com
Schlesien-class: Weisman, WhyMe, DG_Alpha, via shipbucket.com
Emden-class: DG_Alpah, via shipbucket.com
Seydlitz-class: Gollevainen & Hood, via shipbucket.com
Flugzeugdampfer: DG_Alpha, via shipbucket.com
Zerstörer 1945-class: Garlicdesign, via shipbucket.com
Prinz Eugen-class: the-blueprints.com
O-class: MitcheLL300, via shipbucket.com
York-class: Syzmo, via shipbucket.com
Hipper-class: Abram Joslin
Blücher-class: WhyMe, via shipbucket.com
Leipzig/Nürnberg-class: DG_Alpha, via shipbucket.com
Zerstörer 1934-class: Gollevainen, via shipbucket.com
Zerstörer 1936A/Narvik-class: Gollevainen, via shipbucket.com
Type II-class: Darth Panda, via shipbucket.com
Type VII-class: Darth Panda, via shipbucket.com
Type XXI-class: Darth Panda, via shipbucket.com
P-class cruiser: Ashley, via shipbucket.com