England was in debt and they made the colonist pay heavy taxes.
Opposition increased over time because american citizens had kept seeing the results of the war. For example, like increased funding, many deaths, and lost a lot of battles. As the war continued and the US was not progressing any in defeating North Vietnamese forces, Americans began to view the fighting as pointless due to all the consequences. I believe it was justified, because the outcomes could have been avoided if peace with Vietnam was settled earlier or if the US didn't even get involved.
When was the revolutionary war: <span>1775 to 1783 </span>
What gave them an advantage is economic prosperity due to rich soil and development of plantations based on slave labor. Many profit was accumulated from crops (tobacco) and also cotton. Later on in the 1800s when Eli Whitney created the cotton gin it created a boom in the slave industry and increased largely by 71%. After that the tool allowed mass production in textile industries.