U.S. Army South security cooperation personnel accompany Gen. Ricardo Martínez Menanteau, commander-in-chief of the Chilean Army as he visits with the Pennsylvania National Guard Oct. 15 at Fort Indiantown Gap, Pennsylvania, to observe a static display of the Stryker Fighting Vehicle Interoperability allows our Soldiers and systems, and those of other countries, to operate in conjunction with each other, which is critical to bolstering an extended network of partnerships capable of decisively meeting shared challenges.