Who was the only sitting president to lead troops in the field during his term?
The Whiskey Rebellion (also known as the Whiskey Insurrection) was a tax protest in the United States beginning in 1791 and ending in 1794 during the presidency of George Washington, ultimately under the command of American Revolutionary war veteran Major James McFarlane. The so-called "whiskey tax" was the first tax imposed on a domestic product by the newly formed federal government. It became law in 1791, and was intended to generate revenue for the war debt incurred during the Revolutionary War. The tax applied to all distilled spirits, but American whiskey was by far the country's most popular distilled beverage in the 18th century, so the excise became widely known as a "whiskey tax". Farmers of the western frontier were accustomed to distilling their surplus rye, barley, wheat, corn, or fermented grain mixtures to make whiskey. These farmers resisted the tax. In these regions, whiskey often served as a medium of exchange. Many of the resisters were war veterans who believed that they were fighting for the principles of the American Revolution, in particular against taxation without local representation, while the federal government maintained that the taxes were the legal expression of Congressional taxation powers.
Who was the sitting president that lead troops in the Whiskey Rebellion during his term?
George Washington
Whiskey Rebellion
No context provided
Who was the sitting president that lead troops in the Battle of Bladensburg during his term?
James Madison
Whiskey Rebellion
https://en.wikipedia.org/wiki/Whiskey%20Rebellion
Commander-in-chief
https://en.wikipedia.org/wiki/Commander-in-chief
List of presidents of the United States by military service
https://en.wikipedia.org/wiki/List%20of%20presidents%20of%20the%20United%20States%20by%20military%20service
Washington personally led federalized soldiers in suppressing the Whiskey Rebellion, which arose in opposition to the administration's taxation policies.
Presidency of George Washington
Washington commanded a militia force of 12,950 men
Presidency of George Washington
and through a clear show of federal authority, Washington established the principle that federal law is the supreme law of the land,
Presidency of George Washington
President James Madison and most of the rest of the federal government had been present at the battle, and had nearly been captured. 
Battle of Bladensburg
The Madisons escaped capture, fleeing to Virginia by horseback, in the aftermath of the battle, but the British burned Washington and other buildings.[197][198] The charred remains of the capital by the British were a humiliating defeat for Madison and America.
James Madison
During his term, sitting president George Washington personally led federalized soldiers in suppressing the Whiskey Rebellion, which arose in opposition to the administration's taxation policies. Washington commanded a militia force of 12,950 men and, through a clear show of federal authority,  established the principle that federal law is the supreme law of the land. In the Battle of Bladensburg, sitting president James Madison and most of the rest of the federal government were present on the field of battle and were very nearly captured. President Madison escaped capture, fleeing to Virginia by horseback in the aftermath of the battle, but the British burned Washington and other buildings .The charred remains of the capital by the British were a humiliating defeat for Madison and America.