A sheet of four stickers featuring soldiers from some of the chief Allies of the First World War.  These are the three Triple Entente nations:  France, the United Kingdom, and Russia, plus the United States.

From Printify:

"Our vinyl sticker sheet bundle comes with 5 sheets per bundle and gives you the perfect marketing material whether it's for your brand, your art, or your event. With full design & shape customizability, you can create unique sticker bomb sheets with multiple stickers. Available in white, holographic, and transparent versions to choose from.

.: Material: Premium printable vinyl
.: White, holographic or transparent vinyl color options
.: Quantity: 5 sticker sheets per listing"

Entente Stickers, 5 sheets