The women were angry. The price of bread were high, because of poor harvests, which made it hard for the women to feed their family.
There was a rumor that the royal family had all the grain in Versailles. And the women believed it. 7,000 Parisian angry and hungry women (and some men and the king's guards who didn't know how to handle the situation) marched 20 miles to Versailles.
They easily overthrew the king's guards and cut off their heads. Sticking it on poles and went searching for the royal family. The mob of women forced the king, queen, and their son to pack up and lead the way back to Paris without their bread.