tie up with (someone or something)
to enter into an association or partnership with someone or something
Our company will tie up with a company from Sweden to make the pollution equipment.
Worlds Deadliest Martial Arts
A lesser known martial art, Systema originated in Russia. With a strong focus on breathing and fluidity, Systema takes advantage of pressure points and an opponent s momentum to debilitate attacks. Besides hand to hand combat, Systema often involves the use of knives or firearms, making it a deadly martial art for any situation.