Euro zone government bond yields fell from close to multi-year highs on Tuesday as oil prices declined, with traders viewing the latest U.S. sanctions against Iran as preferable to further military escalation.Germany's 10-year bond yield, the benchmark for the bloc, fell 3 basis points (bps) to 3.222%, down from the 15-year high ‌of 3.275% ⁠touched last ⁠week. Yields move inversely to prices. Yields, particularly those on longer-dated bonds, hit their highest in at ​least a decade around the world last week as investors worried about inflation stemming from the ​U.S.-Israeli war with Iran and high levels of government spending.The German 30-year yield fell 2 bps on Tuesday to 3.728%, after touching a 15-year high last ​week of 3.787%.Oil prices fell as markets assessed ⁠the sanctions ‌that the U.S. said would cut Iran's economic lifeline.Tehran promised ​to retaliate ​and expressed confidence that major trading partners would resist Washington's pressure campaign."The ⁠sanctions were not immediate and serve more as a ​threat to Iran rather than immediate action," said Mohit Kumar, ​chief European economist at Jefferies. "(Treasury Secretary Scott) Bessent also kept the negotiation route open."Brent crude oil fell 3% to $89.40 a barrel, down from a one-month high of $94.80 a barrel on Friday. Traders have increased their bets on European Central Bank rate hikes in recent weeks as the U.S.-Iran conflict has again pushed up energy ‌prices, although they trimmed them slightly on Tuesday as oil prices fell.Money markets were pointing to 43 bps of further ECB tightening ​this year, ​down slightly from Monday ⁠but up from the 41 bps priced in at the start of last week.Resilient economic growth has also pushed up bond yields and rate hike bets, analysts ​say. Data on Tuesday showed the German economy grew by 0.3% in the second quarter, above the preliminary reading of 0.2%, while business morale hit its highest level in a year in August.French 30-year bond yields fell 4 bps to 4.862% on Tuesday, down from the 18-year high of 4.923% touched on Monday.