A Commander-in-Chief is the person who exercises supreme command and control over armed forces. As a technical term, it refers to military power in a country's executive leadership.
In the United States, three people where commanders in chief before becoming the Commander in Chief, meaning they were a chief military commander before becoming President. Those three people were George Washington, Ulysses S. Grant and the person this park is named after: Dwight D. Eisenhower
During World War II, Eisenhower became a five-star general in the Army and served as Supreme Commander of the Allied Expeditionary Force in Europe. Thereafter, he served as the 34th President of the United States from 1953 to 1961.
There are many tributes and memorials to Eisenhower. For example, the Interstate Highway System is officially known as the Dwight D. Eisenhower National System of Interstate and Defense Highways in his honor. It was inspired in part by Eisenhower's own Army experiences in World War II where he recognized the advantages of the autobahn system in Germany. In addition, Eisenhower was honored on a US one dollar coin that was minted from 1971 to 1978. His centenary was honored on a commemorative dollar coin issued in 1990.
All of the above is in interesting (in my opinion), but none of it will help you find this tricky-but-not-that-tricky hide. You must be inside the park to find it.