Ukrainian President Volodymyr Zelenskyy announced on Tuesday that Kyiv has formally submitted new peace proposals to the United States aimed at ending the nearly four-year-old war with Russia, though he disclosed no details of the plan. Zelenskyy called on Washington to bolster Ukraine's air defences while pressing Moscow toward a settlement, as US negotiators — who last visited Russia in January — have yet to travel to Kyiv. The Ukrainian leader also warned that Russia intends to use its upcoming parliamentary elections as cover for a fresh large-scale military mobilisation of several hundred thousand troops by year's end, an allegation Russian officials have previously denied.