Gee, break a treaty and attack a neighbour and get bent out of shape when (a) the neighbour fights back, (b) fights back outside of the country being invaded an

Gee, break a treaty and attack a neighbour and get bent out of shape when (a) the neighbour fights back, (b) fights back outside of the country being invaded and (c) others get really annoyed with (a) and (b) and try to balance the situation. Like in every proxy combat that goes back to WW II. Ask the Cubans how Angola went.