Hercules Mulligan was born in Londonderry in Ireland on September 25, 1740 AD, and immigrated to the American colonies when he was six years old, where his parents left their homeland in the hope of improving their family life, and settled in New York, and his father became the owner of a successful accounting company.

Mulligan became a student at Kings College (now Columbia University) and there he met another young man from the Caribbean, Alexander Hamilton, and a deep friendship was formed between them. This friendship would turn into political activity within a few years. Mulligan lived with Hamilton for a while during their studies, and they spent most nights in Political discussions, until Mulligan became one of the first to join the Sons of Freedom organization, which sought the independence of the American colonies from Britain.

As for Hamilton, he was at first in favor of British sovereignty over the colonies, but he was soon influenced by the opinions of the Sons of Liberty and joined them.After Mulligan graduated from the university, he worked for a short time as an accountant in the Hue Accounting Company, but soon he worked as a tailor and established a shop that used to sew high-class clothes in New York And British businessmen and British army officers.

Although he had appointed a number of tailors to work in his company, he preferred to receive his customers and welcome them himself, and he established a large number of relations with the people of the upper class, and his business flourished and he enjoyed wide fame among the people of the upper class and the British officers.

Thanks to his extensive relationships, Mulligan was able to accomplish two important things in his life, the first of which was to marry Elizabeth Sanders in 1773 at Trinity Church, and this matter was not written at the time because Elizabeth was in fact the daughter of Admiral Charles Saunders, who was a commander in the Royal Navy before his death, And this family relationship brought Hooligan into contact with a large number of high-profile personalities.

Also, his work as a tailor allowed him to see some important conversations between British officers, as it was natural at that time for people to speak freely in front of the tailor as if he were an invisible person, and Mulligan was a tactful speaker, so he was able to gather a large number of information about the movements of The British Army often sent that information to General George Washington in New Jersey.

In 1777, Hamilton was a friend of Mulligan's working as a military aide to George Washington, and he realized that Mulligan was in a good position to work as a spy, and Mulligan immediately agreed to help in the national cause, and Mulligan is credited with saving George Washington's life, not once but twice.

The first time was in 1779 AD when British General Martin Fox News visited him late in the evening to buy a coat quickly, and Mulligan asked him why an officer would buy a coat at such a late time, and he told him he would become the rebellious general in our hands, and as soon as he left The officer sent Mulligan his servant to tell George Washington, who was planning to meet with some of his officers, and it seemed that the English had known about that meeting, so Washington changed his plans so that they would not catch him.

And the second time, two years later, when he thwarted another attempt to arrest him with the help of his brother Hugh Jie. In 1781 AD, Mulligan's brother was running an import and export company and was supplying supplies to the British Army, and at that time the army requested the supply of a large quantity of supplies, and when Hu asked why he knew that there was A large number of soldiers were sent to Connecticut to capture Washington. Hue passed the information to his brother, who transferred it to Washington and managed to escape from the British forces.

During the revolution, Mulligan was able to transmit a large number of important information, and he was arrested several times, but the British did not find any evidence against him so they released him, and after the revolution, neighbors dealt with Mulligan in a bad way because of his relationship with British officers in the past, but George Washington visited him He himself in his shop, so that his neighbors knew that he was a collaborator with the revolution.

Mulligan hung on the door of his shop a plaque reading "The Tailor of George Washington", and after that incident Mulligan's shop flourished again and continued in business until he reached the age of eighty, and he died in 1825 and left a wife and eight children, and was buried in Trinity Church in New York near the tomb Alexander Hamilton and Some Other Notable Personalities in the History of the American Revolution.