Yes, Mountainbiker said it well. Just keep your plans as well hidden as possible, and just “be gone” suddenly one day, to the maximum extent possible. Arrogance can lead to retaliation, but the appearance of vulnerability can also lead to oppressors taking advantage of that appearance of vulnerability. Plan carefully and methodically.
"Ye hear of wars in far countries, and you say that there will soon be great wars in far countries, but ye know not the hearts of men in your own land."