What is theistic evolution? Theistic evolution sounds similar to Old Earth Creationism. Both ideas start with the premise that God created. After this, I've heard tale of wars fought between the two camps. What is the gist of the differences between these two ideas?
Theistic evolution (TE) is the belief that we should look to the Bible to learn about God, and rely on scientists to inform us about science. As someone once put it, "The Bible tells us how to go to heaven; science tells us how the heavens go. Science can give us the age of rocks; the Bible can give us the Rock of Ages."

This view holds that there is no conflict between faith and science regardless of the conclusions the scientists reach. This viewpoint has been labeled "theistic evolution" because about 98% or 99% of all scientists in the life science fields accept evolution as the best theory to explain the variety of life forms found on our planet.

TE differs from old earth creationism (OEC) in that OEC generally accepts modern geology and cosmology but not evolution.

TE differs from intelligent design (ID) in that ID proponents hold that science can uncover ways in which God is active in the creation process; TE proponents hold that God has been active, but can accept the "how" of God's involvement as a mystery.