Sally forth
Definition 1 of 1
Pro Tip 1/3Historical Flavor
Often used to evoke a medieval or chivalrous atmosphere in stories. 
With a cry, the knights sallied forth from the castle gates.
Pro Tip 2/3Bold Action
Suggests a spirited or brave departure towards an endeavor. 
She sallied forth to defend her thesis with groundbreaking evidence.
Pro Tip 3/3Archaic Tone
Use it to add an old-fashioned or literary touch to your language. 
The young explorers sallied forth into the forest, seeking adventure.