What was required before Texas could be annexed by the United States? All the debts Texas had acquired had to be paid.
Both countries had to approve annexation.
Texas had to agree to abolish slavery.
Mexico had to approve the agreement officially.

The fact that farmers were paid for destroying crops.

The goods the europeans wanted the most were gold, jewels, silk, perfumes, and especially spices.

Jackson  said nullification 'means insurrection and war,' and called it a treasonous attack on america. the second aspect of the  force bill  was the passing in congress of a lower tariff in 1833. this was offered as a compromise to avoid conflict with south carolina, and to attempt to defuse the tense situation.source google