All four conventions were last checked and agreed on in 1949. Those versions are related to previous revisions. In some cases, ideas from the 1907 Hague Convention were added. Usually, people refer to all four conventions as the "Geneva Conventions of 1949" or simply the "Geneva Conventions". Later conferences have added text that makes it illegal to use certain kinds of warfare, like chemical warfare. They have also spoken about issues of civil wars. 