If the US wants to stabilise the HoA, it should stop intervening. Look at what it did somewhere else, before. But, has it learned a lesson? I doubt it!
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https://www.bbc.com/news/world-middle-east-50050264"The Turkish government's actions are endangering innocent civilians in Syria, and destabilizing the region, including undermining the campaign to defeat ISIS. The United States and our partners have liberated 100 percent of ISIS's ruthless territorial caliphate," the statement said. "Turkey must not put these gains in jeopardy." US Vice-President Pence warned that the sanctions would worsen "unless and until Turkey embraces an immediate ceasefire" and negotiates a long-term settlement on the border.