[Quarrelsome]

don't make it out like its a favour. The US have done very well out of their defense umbrella ensuring its global dominance for most of last century.

Most powers have to pay in blood to do what they want geo politically without question. The US inherited a global state where many potential rivals were weak and helped keep them weak. It was a cost worth paying and its a shame that current US leaders are so cheap and foolhardy to not see what they're throwing away.