On this day 250 years ago in the Pennsylvania State House (now known as Independence Hall) in Philadelphia:

A Declaration of the deputies of Pensylvania, met in provincial conference, was presented to Congress, and read; expressing their willingness to concur in a vote of Congress, declaring the United Colonies Free and Independent States.

Source: Journals of the Continental Congress at p. 478 accessed at https://archive.org/details/us_congress_continental/lljc005/page/477/mode/2up

Also on that day in Philadelphia, Delegate Elbridge Gerry of Massachusetts in the Continental Congress wrote to James Warren, President of the Massachusetts Provincial Congress:

I am in hopes Congress will soon render it unnecessary to take further measures preparatory to the declaration of independence. New Jersey has appointed five new delegates, and instructed them to vote in favor of the question, and it appears to me there is not even a doubt of any colony on the continent except New York and Maryland. These will not impede us a moment. I do not affirm that either of these are of the neuter gender, but on the other hand am persuaded the people are in favor of a total and final separation, and will support the measure, even if the conventions and delegates of those colonies vote against it.

Source: https://americanfounding.org/entries/second-continental-congress-june-25-1776/

On this day 250 years ago in South Carolina, some of the British troops commanded by Generals Henry Clinton and Charles Cornwallis skirmished with 780 South Carolina and North Carolina troops and artillery commanded by Col. William “Old Danger” Thomson across Breach Inlet between Sullivan’s Island and Long Island (now Isle of Palms). Although the British had at least 2500 (some sources say 2800 or 3000) men, General Clinton had found that his intelligence was flawed and Breach Inlet was too deep to wade at low tide, and the British had too few small boats to carry all his men in an assault on Sullivan’s Island. The Americans had one man wounded by friendly fire the day before but the British suffered several casualties.

Sources: https://www.americanhistorycentral.com/entries/june-1776/; Lipscomb at pp. 25-26 & 36; Parker’s Guide at 126