Which US president never participated in combat operations?

Donald Trump has never participated in combat operations, but he received the necessary training at the New York Military Academy, a private boarding school.

The other presidents, however, distinguished themselves in this field: 1) George Washington was commander-in-chief of the Continental Army from 1775 to 1781 and defeated British troops at the Battle of Yorktown.

2) Ulysses Grant was appointed commander of the federal army in March 1864 and led the northern states to victory in the Civil War. He was known for his cruelty towards the civilian population.

3) Dwight Eisenhower was commander of Allied forces in North Africa from November 1942. From 1944, he was supreme commander of the Allied armies. He accepted Germany's surrender on behalf of the United States. He was awarded all the highest military honors of the countries of the anti-Hitler coalition. He was commander of NATO forces from 1951 to 1952.