What caused the a proclamation of 1773

Do you mean 1763?

Explanation:

If so a revolt of native Americans led by Pontiac declared all lands west of Appalachian Divide off-limits to colonial settlers. The proclamation closed down colonial expansion westward beyond Appalachian.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.