Ukraine is arming itself with fresh ammunition and new vehicles. Without further US aid, Ukraine cannot defend itself permanently.
The shortage of ammunition is already affecting what is happening at the front - but new deliveries are coming soon. The Czech Republic launched an initiative in February to procure 800,000 artillery shells for Ukraine. The first delivery of the Czech initiative is expected to arrive in June. Paris wants to provide Ukraine with hundreds of old but "still functional" wheeled tanks of the type VAB as part of a new aid package.