When the US illegally invaded and devastated Iraq in 2003 under the fake pretense of WMD weapons, no sanctions against the US from the other Western countries followed. And of course the US didn't sanction itself and the American people reelected the president who started that war instead of surrendering him to the International Criminal Court.

So, if one constructs a logical chain from that, invading a country doesn't lead to any punishment, neither internationally nor domestically.