Hi,
Your father's cancer was caught early, T2 is considered invasive but not really...there is every reason to expect that he will die in his sleep of old age.
Chemo is most often recommended if lymph nodes were found to be involved. Sometimes it's recommended for stage III tumors. Most people who have a stage II diagnosis do not receive chemo.
The first two years are the key, if he gets through that without a recurrence he will most likely not have one.
All the best to you and your father.
Wendy