Promissory Note issued to Emil Assentato dated September 18, 2023

Exhibit 10.1

PROMISSORY NOTE

FOR VALUE RECEIVED, and subject to the terms and conditions set forth in this Promissory Note (“Note”), Nukkleus, Inc. (the “Payor”), hereby unconditionally promises to pay on demand to the order of Emil Assentato or its assigns (the “Payee”), in lawful money of the United States of America in immediately available funds, at such location as the Payee shall designate, all unpaid advances of principal made from time to time by the Payee to the Payor, on the date three years after the date hereof, or if such a date is not a business day, then the next succeeding business day (the “Maturity Date”), and to pay interest on the unpaid principal amount hereof at the rates specified below.

The Payor further agrees to pay interest to the Payee on the unpaid principal amount hereof from the date hereof at a rate per annum equal to 5% until the Maturity Date, and thereafter, until payment in full of the principal amount hereof (whether before or after judgment). Interest shall be payable on the Maturity Date, on the date of any prepayment and, after the Maturity Date, on demand.

The Payor may prepay the principal amount of this Note in whole or in part at any time or from time to time without premium or penalty; provided that each prepayment shall be accompanied by payment of accrued interest to the date of prepayment.

Upon the commencement by or against the Payor of any bankruptcy, reorganization, arrangement, adjustment of debt, relief of debtors, dissolution, insolvency or liquidation or similar proceeding of any jurisdiction relating to the Payor or its debts, the unpaid principal amount hereof shall become immediately due and payable without presentment, demand, protest or notice of any kind in connection with this Note.

The Payee is hereby authorized to record all loans and advances made by it to the Payor (all of which shall be evidenced by this Note), and all repayments or prepayments thereof, in its books and records, such books and records constituting prima facie evidence of the accuracy of the information contained therein.

The Payor hereby waives diligence, presentment, demand, protest or notice of any kind in connection with this Note. All payments under this Note shall be made without offset, counterclaim or deduction of any kind.

This Note shall be binding upon the Payor and its successors and assigns, and the terms and provisions of this Note shall inure to the benefit of the Payee and its successors and assigns, including subsequent holders hereof. The Payor’s obligations under this Note may not be assigned without the prior written consent of the Payee.

THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

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IN WITNESS WHEREOF, the parties hereto have executed this Note as of the date first above written.