By June 13, 1775, it had been resolved that twenty-three regiments should be commissioned, exclusive of one regiment of artillery, which latter was to consist of ten companies, and had already been partly organized. Such were the constituent parts of the army organized by Massachusetts inside of two months after the 19th of April, 1775, from her local militia; and it was these same raw and undisciplined levies, assisted by the contingents from the neighboring Colonies, which had assembled at Cambridge and Roxbury upon news being conveyed to them that Massachusetts had accepted the gage of battle, who time after time repelled the attacks of picked regiments of troops of Great Britain, until compelled to leave the field by lack of ammunition upon the seventeenth day of June, 1775. No better test of the mettle of the American militiaman, when converted into a soldier, can be conceived than was furnished upon that day when a number of these hastily organized regiments met and shrank not from the attack of trained soldiers. Although, naturally enough, regarded as a defeat, and, therefore, in a measure discreditable to the provincials, so much so that in after years veteran survivors cared not to exploit their participation in the battle, it really had a tremendous moral effect upon each side, the provincials being assured thereafter that under anywhere near like equal conditions they could defeat the British, while for the enemy there resulted the enforced conviction that the colonists were not unworthy foes, and that like victory would be altogether too dearly bought.