The Pine Tree Flag was one of the flags used during the American Revolution

American Revolution

The American Revolution was the political upheaval during the last half of the 18th century in which thirteen colonies in North America joined together to break free from the British Empire, combining to become the United States of America...

. The flag, featuring a pine tree flag with the motto "An Appeal to God," or, more usually, "An Appeal to Heaven," was used originally by a squadron of six cruisers commissioned under George Washington

George Washington

George Washington was the dominant military and political leader of the new United States of America from 1775 to 1799. He led the American victory over Great Britain in the American Revolutionary War as commander-in-chief of the Continental Army from 1775 to 1783, and presided over the writing of...

's authority as commander in chief of the Continental Army

Continental Army

The Continental Army was formed after the outbreak of the American Revolutionary War by the colonies that became the United States of America. Established by a resolution of the Continental Congress on June 14, 1775, it was created to coordinate the military efforts of the Thirteen Colonies in...

 in October 1775. It was also used by Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

' state navy vessels in addition to privateers sailing from Massachusetts.

The Massachusetts General Court

Massachusetts General Court

The Massachusetts General Court is the state legislature of the Commonwealth of Massachusetts. The name "General Court" is a hold-over from the Colonial Era, when this body also sat in judgment of judicial appeals cases...

 established the flag of the state navy on July 26, 1776: "that the Colours be a white Flag, with a green Pine Tree, and an Inscription, "Appeal to Heaven.'"

The phrase "Appeal to Heaven" is used multiple times by John Locke

John Locke

John Locke FRS , widely known as the Father of Liberalism, was an English philosopher and physician regarded as one of the most influential of Enlightenment thinkers. Considered one of the first of the British empiricists, following the tradition of Francis Bacon, he is equally important to social...

 in his work, Two Treatises of Government

Two Treatises of Government

The Two Treatises of Government is a work of political philosophy published anonymously in 1689 by John Locke...

. The phrase connotes that after all other alternatives of seeking justice

Justice

Justice is a concept of moral rightness based on ethics, rationality, law, natural law, religion, or equity, along with the punishment of the breach of said ethics; justice is the act of being just and/or fair.-Concept of justice:...

have been exhausted, only an "appeal to heaven" remains:

“What is my Remedy against a Robber, that so broke into my House? Appeal to the Law for Justice. But perhaps Justice is denied, or I am crippled and cannot stir, robbed and have not the means to do it. If God has taken away all means of seeking remedy, there is nothing left but patience. But my Son, when able, may seek the Relief of the Law, which I am denied: He or his Son may renew his Appeal, till he recover his Right. But the Conquered, or their Children, have no Court, no Arbitrator on Earth to appeal to. Then they may appeal, as Jephtha did, to Heaven, and repeat their Appeal, till they have recovered the native Right of their Ancestors, which was to have such a Legislative over them, as the Majority should approve, and freely acquiesce in.”