https://rusi.org/explore-our-research/publications/commentary/giving-raf-typhoons-ukraine-would-be-very-expensive-symbolic-gesture
https://www.middleeasteye.net/fr/decryptages/algerie-niger-coup-etat-contre-intervention-militaire-sahel-consequences
https://www.sigar.mil/pdf/lessonslearned/SIGAR-21-46-LL.pdf