The widely used M109 carries a 155-mm howitzer and is the principal self-propelled artillery support for ... Later versions, including the M109A6 Paladin, have a 39-caliber barrel.

Ukraine has reportedly received at least 30 units of artillery weapons from Italy ... supporter of Ukraine and has thus far managed to stave off any opposition to sending military aid. The M109 is one ...

This support includes advanced artillery systems ... shells to NATO-standard 105mm and 155mm systems. Among the latest additions are U.S.-made M109 self-propelled howitzers.