The US military has over 1.3 million men and women on active duty, with more than 450,000 of them stationed overseas.
Many of these stationed service members perform training exercises and other duties at rather safe bases. Then there are others who are deployed to conflict zones like Syria or Iraq or potential "hotspots" like Somalia.
We pulled together the numbers and units from around the military to show you where service members are engaged.
US troops are deployed in hotspots around the world, including places like Iraq, Syria, and Afghanistan.
Here's a look at some of the most significant deployments for American soldiers.
In Afghanistan, about 8,400 US troops, most of which are US Army soldiers, are authorized to take part in Resolute Support, which aims to train, advise, and assist the Afghan security forces and institutions in their fight against the Taliban and other terrorist networks.
In Iraq, about 4,000 to 6,000 soldiers are taking part in Operation Inherent Resolve, which aims to eliminate the Islamic State. Only 5,262 US troops are authorized to be in Iraq, but the actual numbers have been larger for a while as commanders leverage what they call temporary — or "nonenduring" — assignments like the one involving the 82nd Airborne in Mosul.
In Syria, 500 US special forces and 250 Rangers are working in support of Operation Inherent Resolve. The Pentagon is also mulling sending an additional 1,000 US service members to the war-torn country.
A new BuzzFeed News report, however, also said that there are really about 2,000 US forces in Syria — about 850 (including US Marines) then previously thought.
In Kuwait, about 15,000 soldiers are spread among Camp Arifjan, Ahmed Al Jaber Air Base, and Ali Al Salem Air Base. About 3,800 soldiers from the 1st Cavalry Division's 3rd Brigade Combat Team also deployed there late last year.
In Poland, about 3,500 soldiers from the 4th Infantry Division's 3rd Armored Brigade Combat Team are stationed as part of Atlantic Resolve, which seeks to halt Russian aggression. These soldiers will help train local forces and provide security, eventually fanning out to other countries like Estonia, Latvia, Lithuania, Poland, Romania, Bulgaria, and Hungary to do the same.
In Ukraine, approximately 250 Oklahoma National Guardsmen are training Ukrainian forces in support of Joint Multinational Training Group-Ukraine.
In Somalia, about 40 US soldiers from the 101st Airborne division are assisting the central government in training its forces and fighting the terrorist group al-Shabab.
US Marines are deployed around the world to help counter the Islamic State. Some are also deployed in efforts to contain Russia and to provide security.
Here are some of the most important Marine deployments.
In Syria, approximately 400 Marines are taking part in Operation Inherent Resolve.
In Afghanistan, 300 Marines are taking part in Resolute Support.
In South Sudan, approximately 40 US Marines are providing security to the US Embassy.
In Norway, about 300 Marines are stationed as part of a bilateral agreement between Oslo and Washington to undergo winter training and reinforce Norway's border with Russia.
While the US Air Force is deployed in bases worldwide, the service most recently sent two F-35s each to Bulgaria and Estonia.
This is where the Air Force has a significant presence.
Two F-35s were recently deployed to Bulgaria for training and "reassuring allies and partners of US dedication to the enduring peace and stability of the region." Another two F-35s recently deployed to Europe and will visit multiple NATO countries in support of European Reassurance Initiative.
Four hundred airmen from the 5th Bomb Wing recently deployed to the Middle East in support of Operation Inherent Resolve.
Here's a view from across the military. In total, about 69,300 troops are assigned to Pacific Command, with 41,990 in Central Command, 34,520 in European Command, and 9,150 assigned to Africa Command.
Though we've shown you some of the most significant deployments around the world, it's worth noting that these graphics are not all-inclusive. We've kept off most traditional bases and training exercises, for example.
Here is a chart of the significant US military deployments worldwide.
There are some other rather significant troops deployed to support in other service members in hotspots.
Thousands of US service members, mostly airmen, are deployed in Qatar, where the US Combined Air Operations Center at Al Udeid Air Base is located.
In Jordan, 1,500 soldiers, a squadron of F-16s, a Patriot missile battery, and M142 High Mobility Artillery Rocket Systems have been deployed because of the war in Syria.
About 7,000 US military personnel, mostly sailors, are based in Bahrain, which is home to the 5th Navy Fleet. A large number of US airmen also operate out of the Shaykh Isa Air Base, where F-16s, F/A-18s, and P-3 surveillance aircraft are stationed.
Elements of the US 379th Air Expeditionary Wing are based in Eskan Village Air Base in Saudi Arabia, where the 5th Navy Fleet also patrols.