Why did Toussaint Louverture invade Santo Domingo in 1801?

Toussaint Louverture invaded the Spanish colony of Santo Domingo in early 1801 primarily to abolish slavery in that territory, which remained legal there at the time.1

By conquering the eastern part of Hispaniola, Louverture successfully extended emancipation across the entire island and brought it under his unified authority. This strategic move also served to demonstrate his independence from France, as he acted without following directives from the French government. Following the invasion, he promulgated a constitution that named him governor-general for life, granting him extensive control over the island's administration, military, and economic policy.1