What happened right after the battle of concord?

The colonists did not show great marksmanship that day. As many as 3,500 militiamen firing constantly for 18 miles only killed or wounded roughly 250 Redcoats, compared to about 90 killed and wounded on their side. Nevertheless, they proved they could stand up to one of the most powerful armies in the world. News of the battle quickly spread, reaching London on May 28. By the following summer, a full-scale war of independence had broken out.