Media playback is unsupported on your device

On board US military exercise warship in South Korea

1 April 2014 Last updated at 07:25 BST

The US and South Korea have carried out in the largest joint military training exercise to be held in the region for 20 years.

Rupert Wingfield-Hayes watched as the US Marine Corps launched a huge mock invasion of South Korean beaches.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.