Is there a connection between territorial expansion and human sacrifices?

Territorial expansion remained popular with the U.S. public, as did the idea of spreading republican government. Many pro-slavery Southerners sought to expand southwards, allowing for more territory where slavery could continue to grow and expand.

Human Sacrifices is the act of killing one or more humans, usually as an offering to a deity, as part of a ritual. Human sacrifice has been practiced in various cultures throughout history.

I mean.

They're both in history and ''practiced''.

Though a connection, no,  Territorial expansion went along with slavery. The act of killing another human being is not very humane nor a connection. Slavery deals with principles of property law are applied to them, allowing individuals to own, buy and sell other individuals, as a de jure form of property. A slave is unable to withdraw unilaterally from such an arrangement and works without remuneration. Human Sacrifices deal with people who have really no choice and are dead either way, victims were typically ritually killed in a manner that was supposed to please or appease gods, spirits or the deceased. Slavery doesn't deal with death. So, no.

they had freedom from the government and from the affairs