July 3
https://www.history.com/this-day-in-history/july-3/washington-takes-command-of-continental-army
On July 3, 1775, George Washington rides out in front of the American troops gathered at Cambridge common in Massachusetts and draws his sword, formally taking command of the Continental Army. Washington, a prominent Virginia planter and veteran of the French and Indian War, had been appointed commander in chief by the Continental Congress two weeks before. In agreeing to serve the American colonies in their war for independence, he declined to accept payment for his services beyond reimbursement of future expenses.
July 3, 1863: On the third day of the Battle of Gettysburg, Confederate General Robert E. Lee’s last attempt at breaking the Union line ends in disastrous failure, bringing the most decisive battle of the American Civil War to an end.
Idaho is admitted to the union on July 3, 1890.
Exploration of the North American continent mostly proceeded inward from the Atlantic and Pacific coasts and northward from Spanish Mexico. Therefore, the rugged territory that would become Idaho long remained untouched by Spanish, French, British and American trappers and explorers. Even as late as 1805, Idaho Native Americans like the Shoshone had never encountered Europeans.