SOUTH BASE, Serbia - Up and down the green valley and rolling hills of Presevo in Southern Serbia, 10 countries' Soldiers endured the summer heat and patrolled for peace under one banner: Platinum Wolf.The multinational exercise (Platinum Wolf) of 502 Soldiers included 80 members of the Ohio National Guard's 838th Military Police Company out of Youngstown, Ohio, who worked in tandem with other countries to master peacekeeping skills like: detention operations, crime scene investigations, Military Operations on Urban Terrain, Crowd and Riot Control, patrolling, and Traffic Control Point/Vehicle Check Point."The wave of the future of combined operations is all about international operations,".said the US Ambassador to Serbia, Kyle Scott. "Having this close contact between the Ohio National Guard and Serbian Forces makes it all the more likely that we can work together in the future, and that's hugely important for all of us."The Ohio National Guard on average conducts more than 20 exchanges with Serbia each year, including Platinum Wolf. As part of the Department of Defense's State Partnership Program (SPP), the Ohio National Guard has had a state partnership with Serbia since 2006.The SPP was launched in the early 1990s as part of Defense Department and U.S. European Command initiatives to engage with the defense ministries and armed forces of the newly independent nations of the Baltics, Central and Eastern Europe and Eurasia. All 54 state/territorial National Guard entities have partnerships now with nearly 80 nations around the world."Our Soldiers worked on peacekeeping missions with other countries," said 1st Sgt. Juan Rodriguez, First Sergeant for the 838th. "In a real-world peacekeeping mission, we might be part of a United Nations (UN) initiative, where we go to another country and maybe there are protests or a riot, maybe food hunger. These different units will be able to assist together to keep the peace while the UN is doing its mission."Countries represented were: Serbia, Bosnia and Herzegovina, Bulgaria, Hungary, Italy, Romania, North Macedonia, Slovenia, the United Kingdom, and the United States of America"The objective of the [Platinum Wolf] exercise is to enhance the interoperability and mutual understanding among the members of the partner nations' Armed Forces at a tactical level during the execution of a peace support operation in a multinational environment," said Serbian Ground Forces Brig. Gen. Slobodan Stopa, the 4th Army Brigade Commander.Rodriguez also stressed that interoperability is key to real-world multinational success."In most UN peacekeeping missions it's hard for one company, which is only about 140 some Soldiers, to actually execute their mission," Rodriguez said. "When you have multiple companies from different countries being able to talk to different languages, being able to assist each other, it just works unifying them together."The two-week exercise, which counts as an Annual Training for most 838th Soldiers, took place June 3-18 at Serbia's South Base, a training center designed by Ohio Army National Guard personnel, and the Borovac Training Area.The 838th participated in Platinum Wolf 2018 and plans to come back in 2020, so there is a developed cohesion between Ohio Soldiers and participating countries.