World War II Slang: GI Soldiers

A GI is a soldier in the US army, especially an ordinary soldier who is not an officer.
Many GIs came to the UK during World War II, and were seen as attractive and exciting by British women because they could provide things such as certain kind of food and clothes that were not easily available in the UK at that time. Some British women, known as GI brides, married American soldiers and went to live in the US.
The GI Bill was a law passed in the US in 1944, which makes it possible for people who have served in the army, navy, etc to continue their education and receive other benefits:
He went to college on the GI Bill.