Junction City has strong economic and historical ties to nearby Fort Riley. Fort Riley is over 100,000 acres in size and is home to more than 10,000 soldiers. If you enter Junction City on I-70 from Topeka, one of the first sights you will see is the "atomic cannon" high on a hill. It is a striking 42 feet in length. This is a tribute to the military men and women and to the many historical monuments that pay tribute throughout the city.