This article is from 2015. It looks like this year (2021) they announced that they have removed all of the ants from Johnston Atoll National Wildlife Refuge: <a href="https://lmtribune.com/outdoors/crazy-ant-strike-team-completes-its-mission-eradicates-menace-from-atoll/article_1a49a67b-a48b-500e-89c9-1d80798fc9d3.html" rel="nofollow">https://lmtribune.com/outdoors/crazy-ant-strike-team-complet...</a>
Video tour of the island by one of the volunteers
<a href="https://www.youtube.com/watch?v=ZrRfIbuwFf0" rel="nofollow">https://www.youtube.com/watch?v=ZrRfIbuwFf0</a>
Here's a similar story about eliminating Argentine ants from Santa Cruz Island (near Los Angeles, California):<p><a href="http://www.californiaislands.net/argentine-ants" rel="nofollow">http://www.californiaislands.net/argentine-ants</a><p>The page was last updated in 2016. I'm not sure of the current status of the project.
The ants arrived on driftwood, it doesn't seem like there was any unnatural cause.<p>By trying to save these seabirds, they are actually messing with nature and the evolutionary process of the island.