In July 1974 a group of Cypriots who wanted the island to become part of Greece tried to kill the president and take over Cyprus.
Five days later Turkish troops landed in Northern Cyprus. They said they had come to protect the Turkish-Cypriots, who didn't want to join with Greece.
The attempted takeover didn't work and the president escaped.
The Turkish soldiers stayed and occupied a third of the island. That set up Cyprus as the divided country it is today.
The Green Line
2400 soldiers from the United Nations (UN) patrol the boundary between Northern and Southern Cyprus.
This is called the Green Line and it separates the