A fuzzy caterpillar on a basil plant in west Bengal, India on December 25, 2023. The caterpillar’s defence system is its hair, which has microscopic barbs that break off easily in the skin of would-be predators. (Photo by Soumyabrata Roy/NurPhoto/Rex Features/Shutterstock)

A girl dismantles a Kalashnikov rifle during a training lesson focused on the “Defence of Ukraine” at the military-patriotic center for schoolchildren in Lviv on May 17, 2023, amid the Russian invasion of Ukraine. (Photo by Yuriy Dyachyshyn/AFP Photo)

A visitor checks automatic gun during International Defence Exhibition and Seminar (IDEAS) 2022 at the Expo Centre in Karachi on November 16, 2022. (Photo by Rizwan Tabassum/AFP Photo)

Drinking from a helmet at a graduation ceremony held by the Military University of the Russian Defence Ministry at Moscow's Victory Park in Moscow, Russia on June 15, 2019. (Photo by Gavriil Grigorov/TASS)

Commandos of the “Underwater Defence” (SAS), the special operation unit of the Turkish Navy take part in a military training in Istanbul, Turkiye on June 13, 2022. (Photo by Ali Atmaca/Anadolu Agency via Getty Images)

People in historical uniforms prepare for a parade at Red Square commemorating the 75th anniversary of the Red Army’s defence of Moscow during the second world war in Moscow, Russia on November 7, 2016. (Photo by Stanislav Krasilnikov/TASS)

A Palestinian civil defence officer injured in Israeli attacks is given CPR on a stretcher at Al-Shifa Hospital in Gaza Strip, Gaza on October 16, 2023. (Photo by Ali Jadallah/Anadolu via Getty Images)

Jacob Trouba, who plays in defence for the Anaheim Ducks, scuffles with Nazem Kadri, of Calgary Flames during a NHL match at the Scotiabank Saddledome in Calgary, Canada on January 30, 2025. (Photo by Sergei Belski/Reuters)