Did abraham lincoln think that secession is unlawful and treasonous?

Yes, Abraham Lincoln believed that secession was unlawful and treasonous. He stated that one cannot separate states physically. He believes that if the government agrees t secession, it will cause anarchy amongst the people in the United States. He stated that  everyone should have a good relationship

The secessionists claimed that according to the Constitution every state had the right to leave the Union. Lincoln claimed that they did not have that right. He opposed secession for these reasons:

1. Physically the states cannot separate.

2. Secession is unlawful.

3. A government that allows secession will disintegrate into anarchy.

4. That Americans are not enemies, but friends.

5. Secession would destroy the world's only existing democracy, and prove for all time, to future Americans and to the world, that a government of the people cannot survive.

Explanation:

those who allied with france gained land and power.