China is making a demonstration of its military might both through ocean maneuvers and a parade of new technology.

The first major flexing of China’s military muscle came during the incident of ships off the coast of Alaska during a visit by President Obama.  The ships entered US territorial waters for the first time, passing within 12 nautical miles of the Alaskan coast.

US military officials say the ships complied with international law despite their proximity to Alaska.

“They already had one of their icebreakers up in that area, and they weren’t that far away with an exercise, and they’ve already started their return transit,” Chief of Naval Operations Adm. Jonathan Greenert told Reuters.

Meanwhile, the military used the anniversary of the ending of World War II to display in a parade a missile that’s designed to take out an aircraft carrier.

The missile, called the Dongfeng DF-21D, is designed to enter space like an intercontinental ballistic missile but the warhead will detach and use radar to target a ship.

“The significance of that weapon is that its warhead, once it detaches from the launching vehicle, is able to slow its descent, turn on a radar seeker, and maneuver to engage a moving ship if it is in the radar “footprint” of the seeker,” Michael McDevitt, a retired United States rear admiral and analyst at CNA Strategic Studies, told the New York Times.

“This is unusual because normally ballistic, by definition, means that once fired, a weapon goes straight to where it was aimed. Heretofore, a ballistic missile with a conventional warhead would not be effective against a moving target because during the time of flight of the missile the target would have moved. The maneuvering warhead is Cold War technology, first introduced as I understand it with the Pershing II land-based missiles Reagan stationed in Europe.”

The missiles have a range of about 900 miles, meaning China could use them to keep American naval vessels out of the South China Sea in the event China attacks Taiwan.