In the book of Numbers, chapter 31, Moses orders the murder of every man, woman, and child in a city that was promised to his own people. When his army came back with children prisoners of war, he rebuked them, ordered them to slay the male children on the spot, and allowed them to keep the female children for themselves as spoils of war (there are plenty of other stories similar to this about the OT, and involving Moses specifically).
So, yeah, warlord.
And about Constantine founding Christianity...
When the religion was illegal by Roman law, there were many separate Christianities with very different beliefs (and they quarreled with one another, as well as with the Jews that wanted to stay Jewish). Once Constantine decided to make Christianity the official religion of Rome, he also picked the specific set of churches that he agreed with and established their representatives as the proper religious authorities. They promptly declared the other varieties of Christianity to all be heresy, had their books burned (some recently recovered in the Nag Hammadi library revealing just how different these Christianities were).
So, Christianity (or at least Catholicism) as we know it today was very much the work of Constantine.
Let's not forget either that Constantine's personally approved proper religious authorities didn't just clamp down on Christians that didn't agree with them they embarked on a campaign of destroying, pillaging, desecrating, vandalising pagan temples, tombs and monuments as well as raping and murdering adherents of these religions who weren't willing to see the light and accept the state approved flavour of Christianity (i.e. the same basic package heretic Christians were treated to). Examples of Christian intolerance and willingness to subject minority religions and secular groups to extreme persecutions and violence (which is a base insult to everything Christ preached) are legion.
You can find examples of such violence and intolerance beginning at the moment Christianity became dominant enough to be able to afford committing such atrocities and they continue until today with one of the latest, worst and most frequently forgotten being the mass murder of Moslems in Bosnia by Christian Croats and Serbs. It pisses me off every time Christian fanatics in my community try to portray Christianity as the religion of love charity and peace while Islam is the religion of war and hate, yet whenever I bring up the subject of Bosnia and what was done there in the name of Christianity they are unwilling to even discuss the issue. The obvious conclusion is that Christianity is not an inherently violent religion any more than Islam is even if some of it's adherents have found clever ways to user these religions to rationalise acts of violence and downright inhuman criminal acts like blowing yourself up on a bus, sawing peoples heads off on camera, torching places of worship or setting up a concentration camp camp where the local Christian perverts can get their rocks off raping moslem women. I don't really see the difference between the way the Serbs behaved with their rape campaigns in Bosnia and the way ISIS is doing by selling Yazidi women in markets in Syria like cattle at an auction.