<h1>Nation under invasion demands Article 5-like security guarantees as coalition weighs sanctions after major western-region aerial attack</h1> A country under invasion reported a large aerial attack causing civilian casualties and damage to critical commercial infrastructure in its western regions, prompting calls for stronger international pressure and potential sanctions against the attacking state. The government seeks clarified 'Article 5-like' security guarantees from a coalition of over 30 states, with negotiations among national security and military advisers expected to crystallize within 7-10 days to define an enforcement framework and potential trilateral talks involving a major power. The attacking state insists any security arrangements must include its participation, raising legal and diplomatic obstacles to a negotiated settlement.