I saw three of my country's warships on a dock in my city when I was a kid. The ship will sail for two months for a humanitarian mission in a very remote country. The warship is engaged in a rescue mission of a civilian vessel held hostage by pirates at African sea.

After sailing for about a month they finally arrived at their mission. The strategy of attack and liberation which had been compiled beforehand implemented. The Navy immediately carry out their respective duties.

After a very fierce battle ultimately the hostages managed to be freed and the pirates successfully conquered. My story is made in a very hurry to @xpilar.