Originating in the universities during the 10th century where a widely dispersed student body gathered periodically to exchange ideas in a common atmosphere, military units of that period adopted

The answer is: The Dining-In

Explanation:

Commanders realized that camaraderie among their members was extremely important  and  provided an excellent situation in which to recognize outstanding soldiers.

the Dining-In is a formal banquet in which a high degree of military atmosphere is maintained, together with an air of tradition and fellowship to promote cordiality, camaraderie, esprit de corps, and professionalism.

answer; i believe the two groups were irish immigrants and chinese immigrants;

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.