Hello im new here so this is my first topic. Do you think the US still had the military bases around the world during the Great war and do you think the enclave are still using them

Welcome. You are new so I will go easy on you.

The United States wouldn't have had military bases around the world by the time of the Great War. It had no allies, there was no longer an United Nations, international trade would have collapsed as resources and oil started to run out. The nations of Europe turned on one another as well as the Middle East. China took over other countries around it and then attacked Alaska. America had closed it's borders and then turned on Canada and Mexico. It would have been to much to keep bases around the world in a world without abundant resources and America would have needed all the man power with it's war with China, and take over of Canada and Mexico as well as deal with internal problems such as food and work riots.

As for the Enclave part. No, the Enclave aren't using them. They aren't around the would or even America for that matter. The Enclave existed on the Oil Rig up till Fallout 2. They feared contamination. Their only mainland base was Navarro which was built as an outpost so they could create the Curling Virus. A means of killing all the humanoid life on Earth, every nook and cranny, including the Enclave on the Rig an Navarro by using the Jet Stream. So they were developing a vaccine but were stopped by the Chosen One and then destroyed. Leaving only Navarro.

Long story short. All the Enclave in Fallout 3 came from Navarro. The Enclave remnants in New Vegas were also from Navarro. The Enclave in Chicago as mentioned in New Vegas also came from Navarro. The Enclave now are remnants. They were remnants in Fallout 3 and they were destroyed in Fallout 3 twice.

Navarro fell to the NCR.