Yemen, despite all the odds being stacked against it, has recently become strategically significant. If you’re not familiar with Yemen, it is geographically isolated, mountainous, hard to govern, only has a small pocket of fertile land, and has a long history of being unimportant.
The Egyptians and British can attest to how ridiculously difficult it is to control Yemen, but the Iranians are trying a new tactic. Iran is leveraging Houthi militants in Yemen by supplying them with missiles and other military support, as a way of replacing the influence they lost in places like Gaza, Lebanon, and Syria. So, Red Sea shipping gets disrupted without having to commit major Iranian resources.
Most terrorist organizations are hard to uproot, but the Houthis might take the cake. However, that doesn’t change the fact that Yemen itself doesn’t matter much, just that it’s currently serving as a platform for an Iranian proxy conflict.