Drawing enemy fire and fake clouds of cotton wool

How to draw the enemy's fire | Ken Kling

These are two of my favorite wartime cartoons, both of which were published in Cartoons Magazine (c1917). Above is a drawing by American cartoonist Ken Kling, with the caption: Cartoonists in the Trenches could be Used to Draw the Enemy's Fire. Below is an ingenious proposal for airplane camouflage by British artist Bernard Hugh, originally published in The Bystander (London), in which he recommends the use of large clumps of cloud-like cotton wool, with the caption: Camouflage for Aeroplanes in the Form of Clouds.

An approach to airplane camouflage | Bernard Hugh