>> I don't understand how invading another country's territory is accepted in 2019. On the other side. What is special about 2019 ? Borders move, countries ex

>> I don't understand how invading another country's territory is accepted in 2019. On the other side. What is special about 2019 ? Borders move, countries expand and contract. New countries form, old countries disappear. Happens all the time. The areas that are being occupied by Turkey have been under ottaman rule since 1500s to WW-I, and only the last 100 years or so they were not! Countries like Syria, Iraq etc have borders that were drawn on maps by people who did not live there. So, long story short expect many countries in Middle East to reconfigure their borders, new autonomous regions spurt and old regions disappear. Border changes happened all the time but the two world wars and the subsequent world order and bloc politics have frozen these changes. Now that post-war order is slowly crumbling so are the dynamics in various parts of the world.