O'Connor then fought on the side of the Republicans in the 1921-22 Civil War, with those who favored rejection of the treaty which brought peace between Ireland and Britain, but at the cost of a divided island.
The treaty brought peace to the island
the island was divided so it wasnt peaceful
( z1 bring :ARG0 ( z2 treaty ) :ARG1 ( z3 peace ) :ARG2 ( z4 island ) )