Early bonds were forged. Depending on where it is used, it has different meaning.
Let’s look at what bond and forge really mean.
(1) something that binds a person or persons to a certain circumstance or line of behavior
For example: the bond of matrimony,
the bonds of friendship 友誼的凝聚力
the familial bond 家庭的凝聚力
(2) something, as an agreement or friendship, that unites individuals or peoples into a group; covenant 同盟; 聯盟
For example: the bond between nations.
(3) (Insurance) a surety agreement 保險保證金
(4) (Finance) a certificate of ownership of a specified portion of a debt due to be paid by
a government or corporation to an individual holder and usually bearing a fixed rate of interest 債券
For example: Government Bond 政府債券. Corporate Bond. 公司債券
(1) to form or make, esp. by concentrated effort 建立
For example: to forge a friendship through mutual trust
forge a close relationship 建立親密的關係
(2) to imitate (handwriting, a signature, etc.) fraudulently; make a copy of with the intent to deceive, counterfeit 偽造
For example: forge a signature. She forged a Green Card
Now let’s see what this sentence really means:
(A) Early bonds (of friendship) were forged (between George and Mary).
=> George and Mary forged early bonds (of friendship).
This meaning is more commonly used, so I would think this is what you wanted. However, you can also translate it as follows, which is not as commonly used.
(B) Early (Government) bonds were forged (by the Mafia).
=> The Mafia forged early (Government) bonds.