The Americans stopped attacking the British outside of Philadelphia after they retreated for the first time because of the weather.
It was winter, and whereas the British were warm and cozy, whereas those Americans who still wanted to fight were frozen and deprived of food and resources. Thus they decided to wait until the weather cleared and then attack their enemies.
The intended meaning is to show how the speaker thinks that the colonists are being unfairly treated by the British government.
In this case, the appropriate thesis statement using the "limited subject + precise opinion" formula is the sentence "Pets are cool."
