Marines, airmen and soldiers recently practiced seizing a small Japanese island in an exercise that honed skills some experts say may be necessary in a face-off against China.

This entire mission profile simulated the process of securing advanced footholds for follow-on forces to conduct further military operations with rapid redeployment.

It kicked off with a free-fall jump onto Japan’s Ie Jima Island for reconnaissance and surveillance before 1st Battalion, 4th Marines “conducted a 600-mile long-range raid” to seize an airfield on the island.

This kind of approach could be necessary should the U.S. need to face-off against China, said American defense and security analyst Paul Buchanan: “I don’t think it’s a coincidence that the Marines are engaging in these sorts of exercises because that’s exactly the combat environment that they’re most likely to find themselves in, at least in the near future,”