I have no issue with the existence of a military cooperation agreement to defend each other in the event of war breaking out, and fail to see how it would be a bad idea.
In case of a World War, military alliances are going to happen whether you want it or not, with the difference that weaker countries will be up for grabs, like Czechoslovakia in WWII. And even Poland actually, UK declaring war after Poland's invasion being sort of a surprise for Hitler.
I have no issue with the existence of a military cooperation agreement to defend each other in the event of war breaking out, and fail to see how it would be a bad idea.
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