When NATO was founded in 1949, the principles of solidarity and cooperation were at the heart of its mission. This shared identity was strengthened in the wake of 9/11, when NATO invoked Article 5 of its charter for the first and only time – pledging to respond to the attack on the US as if it was an attack on all member nations.
 
Almost 20 years later, the chaos prompted by Joe Biden’s unilateral decision to withdraw US troops from the alliance’s longest-running mission shows just how fragmented NATO has become.