the tanks are still 'within' the State of Israel borders. So, your title is wrong. What is correct is that it was EGYPT who violated the Camp David Treaty in August 2011, by deploying "thousands of troops along with tanks to the Sinai, in an attempt to re-establish security in the region." Now that IS currently an on-going Egyptian violation. In addition, they let the Sinai become a safe--haven for El-Kaida along with illegal traffiking of foreigners, prostitutes and drugs into Israel.
Northern California wildfire doubles in size, displaces thousands (Reuters)
from the article: IDF deploys tanks near Egypt border, in violation of peace treaty