steal a march on someone, to

to precede someone who has the same goal; to accomplish something before someone else does. Jeff stole a march on all of us when he had his story published. Our competitor stole a march on us and got the big contract.

Gain an advantage over unexpectedly or secretly, as in Macy's stole a march on their rival department store with their Thanksgiving Day parade. This metaphoric expression comes from medieval warfare, where a march was the distance an army could travel in a day. By quietly marching at night, a force could surprise and overtake the enemy at daybreak. Its figurative use dates from the second half of the 1700s.

To gain an unexpected or surreptitious advantage. This expression comes from medieval warfare, when a march meant the distance that an army could travel in a given time, usually a day. By marching at night, a force could surprise the enemy at daybreak or at least could come much closer than was anticipated, thereby gaining an advantage. By the eighteenth century the term had been transferred to peacetime enterprises. “She yesterday wanted to steal a march on poor Liddy,” wrote Tobias Smollett (Humphry Clinker, 1771).