Leaders from across the North Atlantic Treaty Organisation arrived in London to celebrate the seventieth anniversary of the alliance. Yet the gathering was noted for its tensions rather than its harmony.

While Boris Johnson (the British Prime Minister and the summit’s host), reaffirmed his country’s “rock solid” commitment to NATO and reiterated the idea of “one for all, and all for one,” this was certainly not the attitude between U.S. President Donald Trump and his French counterpart Emmanuel Macron. On the first day, the two figures clashed over a number of issues.

This was not unexpected given Macron’s comment last month about NATO being “braindead,” due to the perceived declining American commitment towards the alliance. In typical fashion, Trump lashed out by accusing Macron of being “very disrespectful” as well as attacking France for having “a very high unemployment rate.”

Disagreements continued over the issue of military spending as well as the question of what to do with foreign ISIS fighters. The two did agree, however, in their opposition to Turkey’s decision to buy Russian-made S-400 missiles: Trump suggested the possibility of sanctions, while Macron asked “how is it possible to be a member of the alliance… and buy things from Russia?”