WW1 exhibition at the Berlin Historical Museum
2 August 2014 Last updated at 01:48 BST
One hundred years since the start of World War One, countries around the world are remembering events.
Germany's commemorations have been low key compared to most other nations that fought.
The Berlin Historical Museum is holding the only exhibition in Germany to look at the war and its European and global implications.
The BBC went to see some of the key exhibits.
Video journalist: Dan Damon