WWII memorials solemn reminders of war tragedy

Dec 13 marks the National Memorial Day for Nanjing Massacre Victims, which is established to commemorate the 300,000 Chinese people killed by Japanese troops after the fall of Nanjing in World War II.

Memorial days were set up by governments of the war’s major belligerents to remember those who died or sacrificed themselves, and to remind people of tragedies caused by war. Here are ways different countries keep the memory of the wartime history alive.