KYIV, Ukraine (AP) — An American proposal to end the war in Ukraine puts the country in a delicate diplomatic position — caught between placating its most important ally, the United States, and not capitulating to Russia, its much larger neighbor that launched a full-scale invasion nearly four years ago. The 28-point peace plan was crafted by the U.S. and the Kremlin, without Ukrainian involvement. It acquiesces to many Russian demands that Ukrainian President Volodymyr Zelenskyy has categorically rejected on dozens of occasions, including giving up large pieces of territory.