This morning, Israel has committed 55,000 soldiers and 8,000 police to the effort.
Large groups of settlers have burned tires and formed human chains to block Israeli troops in the largest Gaza settlement. Protesters ringed the troops as they entered through a back entrance. Israeli authorities say other settlements came under fire from Palestinian militants.
There were no immediate reports of injuries from any of those incidents, which took place just hours after Israel closed the Kissufim border crossing that settlers used to enter Gaza.
Earlier, hundreds of troops marched toward the locked main gate but didn't force their way in. The first eviction notices were served in two secular communities in northern Gaza that have virtually emptied out. Troops encountered no resistance, although one man rushed out of his home and yelled at the troops "you should be ashamed of yourselves."
Israeli troops began sealing off all 21 settlements in Gaza, barring anyone from entering, and were informing Jewish settlers that they have 48 hours to leave the Palestinian territory or be removed by force.
The settlers will receive compensation for the loss of their homes. While the amount will vary, the total aid package approved by Israeli lawmakers totals $870 million.